Well, this is also a business based on trust. If you want to become a regular and get repeated bookings (especially multi hour bookings like overnights) then I need to be able to have some rapport with you that comes with building trust, yes, even outside the bedroom.
Oh and those accountants and lawyers and what not you mention? They still go out and play golf with their best clients, and those who refuse and never go golfing get less and less business. Is not "forcing" a friendship, is building trust and network. So save your “petty” and “manipulative” comments to yourself.