Gliding clubs come in all shapes and flavours. They can however be broken into 2 main types, winch and aerotow. Sub groups would be ridge/hill site or flat. Further division would be privately owned (think FBO type operation, ala USA) or commitee run. Pick your club very carefully to suit your needs.
Gliding can be very expensive on time. Self help clubs need lots of membership input to run the launch point, instruct, fly the tug, drive the winch, retrieve the gliders after landing, run the bar after flying etc etc. Commercial type operators tend to provide much of the labour, but charge for it in membership, launch and flying fees. Both types will have a high proportion of private owners. Commitee clubs will expect you to either get the kit out and help before you fly, after you fly and to put it away, or possibly both. Private operators are much more relaxed about you turning up, getting a launch, then going home (or the bar) after landing.
As with most things, pay your money and take your choice.
Good luck.