Sean Connery in a kilt wins hands down...no offense to Jeff.
However, a concertina is a magnet, chick or other wise. Between sets there are folks often of the female variety that are very drawn to the little box and they offer to by a pint or dram. Perhaps it is to my advantage that Bluegrass is a bit slim in the concertina department, so questions are asked when I let's er' rip on a standard like "Rawhide".
I've never been to a jam (and that includes bluegrass, yes) where that happened...You just have the Sean Connerty touch, Mark!