If I recall correctly, I think the Valentin Riviera Maya does only one a day. However, I don't think they specialize in weddings (at least that it was a TA told me) so just because they do one a day doesn't mean it will go any more smoothly or be more organized if they don't specialize. I'm getting married at the Royal Playa del carmen. I believe the # of weddings they do a day depends on the sizes of the weddings, locations, etc.