Story...SILs best friend (who I have known for many years and who I like very much) is getting married this summer. I was pleasantly surprised that we got an invite (dh and I that is, not the dc)
Apparently it is now quite common at wedding receptions for there to be a sort of choreographed/staged dance routine (I had NO idea this happened, having been married a long while and never been to a wedding where this happened!)
Soooo, SIL has asked me to take part (they are short of girls and people keep dropping out).
I am mortified I think it sounds dreadful and vomit inducing.
However, SIL seems sure the BTB will love it and she is pretty desperate - or she wouldnt have asked me!!!!!!!!! 
So, do I grit my teeth, make a complete arse of myself and give the BTB a good laugh or say no.........
WWYD?????