Email marketing for cafes and coffee shops

Why this matters for your venue

Email marketing generates a $36 return for every $1 spent [1], outperforming social media advertising by a wide margin. For cafes and coffee shops, the business outcome is specific: turning a one-time visitor into a daily regular. A 5% increase in customer retention can increase profits by 25% to 95% [2], and for a high-frequency, low-ticket business like a cafe, the lifetime value of a loyal guest is substantial.

The problem is not sending the email. The problem is building the list. Staff cannot ask for an email address while steaming milk and managing a queue. Generic email tools like Mailchimp or Klaviyo will send your campaign, but they rely on you to provide the audience. Without a frictionless way to capture first-party data at the point of service, your email list stagnates, and you remain entirely dependent on passing foot traffic with no way to re-engage it.

See also: Why bought email lists fail venues

The approach

The mechanism is your guest WiFi. When a guest connects to your network, Purple Engage presents a branded captive portal - a splash page. To access the internet, the guest provides their email address and explicitly opts in to marketing communications. This creates a verified, conscious-choice, first-party data list. Every email is tied to a physical visit, with a timestamp, a visit frequency count, and a dwell time.

This is the foundation of cafe email marketing: capture the data at the point of service, then use that data to drive the next visit. Mailchimp sends the campaign; Purple Engage builds the audience.

How to do it with your guest WiFi

Guest WiFi from Purple integrates directly with your existing hardware. Whether you use Cisco Meraki, HPE Aruba, Ubiquiti UniFi, or Ruckus, you do not need to replace your access points. Purple operates as a hardware-agnostic cloud overlay.

The workflow has four steps.

First, the splash page. When a guest selects your WiFi network, Purple intercepts the connection and displays a custom splash page. This page must be mobile-optimised, as the majority of cafe WiFi logins happen on smartphones.

Second, the capture. The guest enters their email address or uses a social login via Google Workspace or Microsoft Entra ID.

Third, the consent. The guest checks a clearly labelled box to accept the terms and opt-in to marketing. This is the GDPR-compliant conscious-choice opt-in that makes the data legally usable.

Fourth, the CRM. The email address, along with visit timestamp and device data, flows instantly into Purple Engage. The list builds itself without any staff involvement.

Purple operates across 80,000+ live venues globally, with 440 million logins recorded in 2024 (Purple internal data). The platform is ISO 27001 and GDPR certified.

What to send, and when

Building the list is only the first step. To drive revenue, you need automated campaigns that trigger based on guest behaviour, not on a content calendar you have to maintain manually.

Campaign	Trigger	Goal	Typical Offer
Welcome email	First WiFi login	Drive second visit	10% off next purchase
Win-back	30 days without a login	Re-engage lapsed guest	Free item with next purchase
Slow-day promo	Scheduled broadcast	Fill off-peak periods	Time-limited afternoon deal
Birthday reward	Date of birth match	Build emotional loyalty	Free drink or upgrade
Seasonal launch	Manual broadcast	Promote new menu	Early access or tasting event

The welcome email is the highest-impact automation you will ever set up. Open rates for triggered welcome emails in hospitality regularly exceed 50% [3]. Set it to fire one to two hours after a first-time login, while the positive experience is still fresh.

The win-back campaign is where the WiFi-email integration becomes genuinely powerful. Because Purple tracks physical presence via network logins, the system knows when a regular guest stops coming in. A 30-day absence triggers the campaign automatically. The cost of a free pastry is negligible compared to the lifetime value of a returning regular.

Measuring what works

Do not judge success solely by open rates. The restaurant industry average open rate sits at 43.6% [3], which is a useful benchmark, but an open does not generate revenue. A physical return visit does.

Because Purple Engage ties the email address to the device's network session, you get closed-loop attribution. You can see that you sent 500 win-back emails, 200 people opened them, and exactly 42 of those guests physically walked back into the cafe and logged onto the WiFi within the following seven days. That is the metric to report: revenue generated per send, and return visits attributable to each campaign.

Personalised email campaigns can produce a 20% lift in spend by recipients over 30 days, compared to generic broadcast sends (Olo, 2025).

Where to start

1. Confirm your WiFi hardware vendor (Cisco Meraki, HPE Aruba, Ubiquiti UniFi, Ruckus, or other).
2. Configure a branded captive portal in Purple Engage with a clear GDPR opt-in checkbox.
3. Set up one automated welcome email with a second-visit incentive.
4. Monitor list growth and capture rate for 14 days to establish your baseline.
5. Add the win-back automation once you have 60 days of visit history to work with.

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References

[1] Litmus, "The ROI of Email Marketing," 2025. https://www.litmus.com/blog/infographic-the-roi-of-email-marketing

[2] Bain & Company, "The Value of Online Customer Loyalty," cited in Harvard Business Review, 1990.

[3] MailerLite, "Email marketing benchmarks by industry and region for 2026," December 2025. https://www.mailerlite.com/blog/compare-your-email-performance-metrics-industry-benchmarks