I have experience from this. I think the best thing is to feel exposed and forced to laugh, and maybe more, which is something I always try to refrain from ^^
(But always fail..)
I don't live in Berlin but I really liked your description!
As myself, I'm 35. Ticklish (and therefore I am very good at tickling others also).
Feel free to send a message with your contact info for messenger or anything :)