My cousin Jennifer's first dance with her husband was to "She's Got Legs" by ZZTop. o_O And there was some song that the dj played at my other cousin Jenny's wedding that I am totally blanking on right now, but it was either about or from the perspective of the "other woman." O_O That particular DJ was kind of a giant ball of inappropriateness, though, start to finish. (He was a friend of the family and had volunteered his services in lieu of a gift; he figured that the setting -- a park next to the beach in Santa Barbara -- meant that he could show up in shorts and a tshirt and flipflops even though the wedding itself was semiformal; he was drunk before the [less than 10 minutes by my mom's watch!] ceremony had even ended.)

That said, I cannot stand any use of any Fiddler on the Roof song at weddings, but that may have more to do with the fact that I hate those songs anyway than any appropriate/inappropriateness of theme!