So wedding dress or accoutrements stores, caterers, musicians who play at receptions, wedding photographers, bed and breakfasts and so on have to serve perverts as though they were a married or soon to be married couple. Probably a lot more entities.
This is part of why I won’t rent out part of my house. In theory we could do it with a few minor changes to the structure, but I wouldn’t be able to refuse a homosexual couple from living under my roof.