I too am sorry about A&C's experiences, but that kind of rudeness is very rare in my experience. The worst thing about my club (Essex) is the risk that the CFI and I break out with a burst of ukulele playing. And we have a special scheme for PPLs who want to try gliding, so it's a mixture of good and bad.
Much more likely is being ignored, because many glider pilots seem shy of speaking to strangers. No idea why, but it's surprisingly common. Just march up to the centre of activity (usually some kind of control caravan) and say that you fly, at which point someone will always recognise a kindred spirit and show you round.