My mother-in-law wants us to do a dollar dance. I have been to many weddings where there has always been a dollar dance, so its not un-common. But I feel really bad for doing one. Plus on top of it, we are only paying for a keg of beer so the rest will be cash bar. I feel like because we are doing cash bar and expecting guests to pay for some drinks that it wouldnt be appropriate. What do you think?