A long time ago I offered to do a friends wedding for free (yup, that long ago). It was in a very posh brand new rebuilt hotel just down the road in the same village....I set up early (around midday) so that I wouldn't be under anyones feet & said I'd be back by seven....then the hotel gets sh*tty because they don't have a music system.....they expected me to provide music (for free) for around ten hours or so....(no, I didn't, before you ask).