There's both. Depends on the girl. Either girl comes over to your place or she stays the night at the hotel where you guys go to. I've only done this with KTV girls. Is it worth it? Hmm... I guess if you're looking for company, ie. someone who you can also talk to for awhile etc, then it's worth it, otherwise based on a 2k overnighter cost (not including hotel room) then I'd rather try out multiple girls. Sometimes it's pretty fun, especially when you pick a really good girl who can carry a conversation and is interesting. This is usually what happens when people fall in love with their service provider lol
Ahh... memories...