We have allowed our single friends to bring a guest, we are not staying at an AI and do have to pay per person for the recpetion dinner, open bar even set up fees, but it only ends up being about 3 or 4 extra people for us and we wanted those guests being comfortable. My brother is even just bringing one of his friends down. It just even better for excursions that way those guests dont feel they have to hang around people they dont really know.