A one day winch launch course - 6 launches...
that should do it for most of you intrepid birdmen. At Shenington, my club, that would set you back £125 for 6 launches, including the instructor. You should mention you already fly in power, and basically want the actual experience of dealing with failed launches right down to the grass....have fun!
Come on your own, best without family or friends, so you can concentrate. And yes, you will have to push gliders out of the hangar, tow them to the launchpoint, help the other chaps on the course, and all that. It is actually more sociable than power flying, but it will take a day of your life, so bring a packed lunch.
Tell them Mary sent you!