There are women at the LA gatherings that 'ler, and will likely happily work you over. All you gotta do is be clean and sociable.
Locations vary. LA's is at a club usually, these days, but has occurred in hotel suites, too. Munches tend to be in lounges there, though they have also occurred in outdoor 'food court' style areas. Whole point is to make a munch somewhere that's either out of the way or so crowded that no one knows or cares what's going on in your group.
Gatherings are largely continuations of the social aspect of the munch, and tickling occurs consensually between people. Haven't had an event yet where a willing, well-groomed 'lee didn't get tickled once they declared their desire. When you call "safeword" it all ends and you're free to do what you normally would do.