Red Planet bikes are the nearest shop to the Croft Trail. They hold a ride every Tuesday night, starting from the shop. Google map of shop location.
From their site:
All you have to do is pitch up at your favorite bike shop between 6pm and 6.30pm every Tuesday night with your dancing shoes on and we’re off for a ride! Well, cycling shoes would be better, but you know what I mean. We’re usually out for a couple of hours, it’s a friendly pace. Come on, don’t be shy, see you on Tuesdays.
The rides usually go over the ridgeway, sometimes using the Croft Trail as part of the route. It’s a friendly and fun event. You’ll often find MBSwindon riders on the ride.