Spot on there, you've done some good initial research.
The nightlife, good girls or WL's are all centred around Bangla Road. The higher end clubs will be full of other travellers, and there are touts all over the place spruiking drinks deals at certain clubs. Even if you don't take them up on it, you'll know where to head for a sticky as they'll be the places frequented by other drunk Euro backpackers etc. Don't rule out the day game either, talk to girls at your hotel or at the beach or on your tour boat to Phi Phi or whatever, and arrange to meet them later.
Failing that and resorting to "Plan B / P4P", again it's all on Bangla Road. A few go go's, loads of beer bars and a few clubs frequented by FL's. I had a lot of joy in Hollywood back in 2011.
Yes, the girls interpret ST as one shot, blow & go. LT is open to interpretation, to the girl it might mean ducking off at 6am after THAT emergency phonecall, which will disappoint if you've got plans to lazily fuck her well into the following afternoon. See my tips in the other threads here, and clarify LT in advance by asking how long she will stay if it's important to you. Bear in mind you'll be taking them out late if you've already struck out elsewhere, should leave you a bit of room to manoeuvre in your negotiations.