The Grim Tickler
Halloween 1992 I went to a dance club Halloween party dressed as the Grim Reaper. My costume included a large plastic sickle. A couple of the bar's attractive waitresses wore costumes that exposed their midriffs, so I used the sickle to tickle their sides and bellies.
As the sickle's handle was long, I did not have to be close to tickle the waitresses. That really helped with one girl I got, as I tickled her right side from behind - she did not even see me approaching her. I forget the girl's name, but she was not the most jovial of people to begin with.

But she was young, attractive and, I learned, ticklish, because when my sickle tickled her bare flesh, she shook! She turned, saw me, and said, "Don't do that." The grumpy gal did not smile or laugh, so the Grim Tickler moved on.
Another victim was a hot little number named Michele, also a college-age waitress. She was at a bottled beer station. Michele saw me with my sickle, approaching her bare midriff, and smiled when she realized what I was about to do. I'm not sure how much I actually tickled her, but she was grinning as I tickled her side and belly with the plastic sickle.
I still have that costume. Gotta attend another Halloween party some year.