Some thing those who say the band are not guests and shouldn't be fed need to think about is that quite often these days weddings are further and further away from towns and cities, I did a dep gig at a wedding in the lake district, we had to be there early to set up, a round trip to a normal food place would have been well over an hour at least, the band wouldn't have got into one car either. A meal in the hotel with a drink would have cost £30 a head easily so we could have either added £180 to the bill or asked for the band to be fed, which they did with platters of sandwiches in the meeting room they'd set aside as a green room.