Email marketing for cafés and coffee shops

Why this matters for your venue

Email marketing delivers a $36 return for every $1 spent [1], vastly outperforming social media advertising. For cafés and coffee shops, the business outcome is very specific: converting one-time visitors into daily regulars. An increase in customer retention of just 5% can lift profits by 25% to 95% [2], and for a high-frequency, low-ticket business like a café, the lifetime value of a loyal guest is substantial.

The problem is not sending emails. The problem is building the list. Staff cannot ask for email addresses while steaming milk and managing a queue. Generic email tools like Mailchimp or Klaviyo will send your campaigns, but they rely on you to supply 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 footfall 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 - the splash page. To access the internet, the guest provides their email address and explicitly opts in to marketing. This creates a verified, conscious-choice, first-party data list. Every email is tied to a physical visit, complete with a timestamp, a visit-frequency count and dwell time.

This is the cornerstone of café email marketing: capture data at the point of service, then use that data to drive the next visit. Mailchimp sends campaigns; 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 run 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.

Step one, the splash page. When a guest selects your WiFi network, Purple intercepts the connection and displays a custom splash page. This page must be optimised for mobile, because the majority of café WiFi logins happen on smartphones.

Step two, capture. The guest enters their email address, or signs in socially via Google Workspace or Microsoft Entra ID.

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

Step four, CRM. The email address flows immediately into Purple Engage along with the visit timestamp and device data. The list builds itself with no staff involvement whatsoever.

Purple operates across more than 80,000 active venues worldwide and recorded 440 million logins 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 triggered by guest behaviour, not a content calendar you have to maintain by hand.

Campaign	Trigger	Goal	Typical offer
Welcome email	First WiFi login	Drive the second visit	10% off the next purchase
Win-back	No login for 30 days	Re-engage lapsed guests	Free item with next purchase
Slow-day promotion	Scheduled broadcast	Fill off-peak hours	Limited-time afternoon offer
Birthday reward	Date-of-birth match	Build emotional loyalty	Free drink or upgrade
Seasonal launch	Manual broadcast	Promote a new menu	Early access or a tasting event

The welcome email is the highest-impact automation you will set up. In hospitality, triggered welcome emails routinely achieve open rates above 50% [3]. Set it to fire one to two hours after the first login, while the positive experience is still fresh.

The win-back campaign is where the WiFi-to-email integration becomes genuinely powerful. Because Purple tracks physical presence via network logins, the system knows when a regular stops visiting. Thirty days without a visit triggers the campaign automatically. The cost of a free pastry is trivial compared with the lifetime value of a returning regular.

Measuring success

Do not judge success by open rates alone. The hospitality average open rate is 43.6% [3], which is a useful benchmark, but opens do not generate revenue. Physical return visits do.

Because Purple Engage links 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 café and logged into the WiFi within the following seven days. That is the metric to report: revenue per send, and the number of return visits attributed to each campaign.

Compared with a generic broadcast send, personalised email campaigns can lift recipient spend by 20% within 30 days (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 an 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.

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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