Information needed, please.

[LC]

Every year around Memorial Day, I travel to NYC to visit my friend
'John'. This year he's been telling me about a practise he engages in
down at the bath-house called 'Gerbiling'. Having been active in the
community for years, I've heard of this but always assumed it was just
an urban legend. He swears it's for real, that he really enjoys it, and
he wants me to do it with him when I visit this year. The thought of it
intrigues me and I know I'd love to try it, but one thing concerns me:
Is it safe for the gerbil? Any help someone could offer would be
greatly appreciated.