just started riding with my local club and im loving it.
i guess its the best time of year to start as they will all be taking it easy before the time trial season starts again.
i've been lucky to find a very welcoming bunch with a full range of rider types.
doing 50 miles with a group is a lot easier than doing it on your own, mainly because you can shelter from the wind at the back of the group if you need to.
if you have never ridden in a group before be honest about it and ask one of the guys to talk you through the ride "etiquette", hand signals and calls. on a particularly technical road it can be a bit like doing the time warp
i like to eat on a ride but no one else in the club seems to, i guess they are used to a higher mileage/pace, but dont let this put you off. if they are a club worth joining they will accept you the way you are.
be honest about your capabilities. they may be able to take you on a good long circular route that doesn't actually go that far from "home". a "there and back" route could put you 40 miles from home at the furthest point and if your struggling its a long way back.