Way to go, nontkl! Before I married, I did stuff like that occasionally. (Just take a chance and impomtu socialize with a stranger.) I found out that the shy, quiet girls don't seem to get out much. They were usually happy someone had noticed them, no matter how pretty they were.
Don't know about tickling at work. Seems dangerous to me, although I love reading about it.
Of course, when you get them away from the office... carpe tickle! That was my motto. Now that I'm married I don't do that sort of thing, but every now and again I run across a lady I did socialize with. Nice memories for sure.