I’ve had hotels in Phuket ask for joiners fees, but the majors in Sukhumvit allow guests.
some will even call if you order outcall. Some ask for IDs before the girls come in, but I’ve found coming back to the hotel after midnight gets very few questions.
plus the girls are generally more into it if you’re staying in a decent place.
no-one wants to get plowed in a 1.5star hole with dirty furnishings 😉