Real Ale Train at the Isle of Wight Steam Railway gives adults a beer-focused railway weekend with a later timetable than the usual Havenstreet day. The event page lists bars from 16:00 and a special service running through to a late return, while station entry is free for people who are not travelling. Train tickets are still needed if you want the moving part of the evening.
The appeal is the pairing: real ale and steam trains, without pretending either is background decoration. You can keep it simple with a station visit, or ride the service and make the journey part of the night. Because the checked page did not list a typical adult train price for this event, the important pre-trip step is to confirm fares and departures before you invite the group. Nobody wants to plan a beer evening around a timetable they have not checked.
This sits in food and drink events, but it will also appeal to railway people who like the atmosphere after the day crowds thin out. Agree transport home before the first pint, take a layer for the platform, and treat the late trains as the reason to slow down. It suits couples, friends and visitors who want an Island evening with a story attached.