I went on a hen do a few weeks ago to Spain. The only people who could attend were the bride, mother of bride, mother of groom, myself and one other woman. So not even any of the bridesmaids/sister/best friend etc.
The other woman was miffed (but didn't make this known to the bride) as she received her invite on the hen do which was only to the evening. She thought that seeing as she was one of the few who made an effort to attend the hen do abroad, it was a bit off to invite her only to the evening.
I assume bride wanted to keep numbers down as they are friends and get on well from what I saw on holiday.
Who is BU?