One reads a lot about how going out of your comfort zone boosts your creativity. I don’t know if that’s the case with the activity described here.
A few years ago a friend told me about Dr. Sketchy’s. It is themed drawing sessions in a bar with the models whittling down their costumes to nearly nothing as the evening winds down. Burlesque, purposely strange and amusing. You can see how it all started (in NYC), and why, at the Dr. Sketchy’s FAQ. Note that the Northampton branch is not nearly as snazzy as the pictures on the official Sketchy’s page would indicate that at least some of the other branches are. Dr. Sketchy’s Northampton is decidedly funky, but that’s a compliment.