We went to a wedding last weekend - the bride and groom were especially thankful that their guests came out to celebrate despite the near hurricane conditions outside. Also, Erich and I learned that the quasi-salsa and semi-swing dancing we do impresses lots of people. I think the trick is to know about 4 different kinds of turns/spins and make sure the follower knows the leader's signals. Then when 2 or 3 of those turns are done in succession, you can impress everybody.
The bride and groom at the after-party practicing the Dirty Dancing running-jump-catch-thing. This was one of their weaker attempts, though a couple were quite good.