If you see WGs and they stop charging you it becomes dating.
I do find longer bookings slightly better, especially if we go out for a meal after. I don't pay the WG for the dining part of the booking (I just pay for the meal).
An overnight is a bit different as I pay one fee for about 14-15 hours, but normally manage sex 4 times. I like an overnight because sex can be more spontaneous, when I get horny it just happens. Also a good WG will try to get me horny and initiate sex by lying on the the bed with her ass on view etc.