Well I know of a place that does not specifically cater to tickling and foot parties but bdsm parties and sometimes tickling goes on there as well its calle SinsCenter and they have a website look up TickleChgo on this forum and he can give you information as to how to reach the website and they do have a free Friday admission but you have to register for it on the first Friday of every month. I went there once and did meet a lady after talking with her that let me tickle her, she actually told me during our conversation when I told her I was into tickling that she dated a guy once who loved to tickle her. That is how it all began.....LOL
Check this place out.