I'm in two minds about that
Over the last year I've been to 2 sites to start my return to gliding. Both use the flying list method.
I have been to clubs where you can book a time, but where that happens, unless there is a professional staff, you can find there is no-one there to help.
When I took up power flying I got frustrated that people just turned up for their booking then p*ss*d off. No-one stayed around.
Gliding is a time-consuming, frustrating sport that requires commitment. Even more so than with power flying. It is not something that can easily be booked.