Smaller clubs tend to rely solely on volunteer support, ie club members. Larger clubs will often have a core of paid staff & enough student pilots to run the launchpoint. The majority of qualified pilots at large clubs will turn up on a soaring day, put their glider in the launch queue, fly as much as they like & after landing, put their glider away & go home or sit around in the bar.
Of course, to get to the qualified pilot stage you may have to spend some time as part of the student pilot group helping at the launchpoint. Again, some of the larger clubs will do 1:1 instruction where you get your own instructor for a half or full day.