Errr, if you find an opportunity to do some tugging in one, for a gliding club, who will be relying on you to be serious about turning up and doing the flying, properly, then they'll probably check you out in it - if you've got the right credentials to start with (probably, but not necessarily, including a Silver C or similar).
If you're just after a check-out and a quick thrill, then please don't waste a gliding clubs valuable time and resources...