To reply to this thread... for the majority of chicas, this is work and nothing you do will entice them to stay any longer than agreed to. In fact, most of these are doing their best to make you C*m so they can leave early. They are purely in it for the money. Most are typical clock watchers. And some will be solid (professional) providers, but they just aren't interested in anything beyond the work.
However, there is a percentage of chicas that are out to make money but are open to the idea of having a good time. But lets be real, they have to find you (or something about you) appealing, they are human afterall. And they like to drink, dance, go out to eat, love sex, etc. You gotta find one of those chicas. If you want to have more time in the bedroom, find one of those that loves sex and make her C*m (for real), she'll stay longer guaranteed. That sounds simple who doesn't love sex right? You'd be surprised how many of them despise men and hate sex, and only do it for the money. Many of these chicas have been dogged by men (knocked up and ditched), some may have been phyiscally/sexually abused, etc. There are also full blown lesbians working the indy places and MP's.
Honestly, I have no advice on how to find one of these chicas. Probably most just luck. But the numbers are not in your favor. Lets say there are 20% of chicas that are open to this idea. Of that 20%, you'll have to find one that loves sex. Generously, I'll give you that half of the 20% do. So that's down to 10%. And then the chance that you will be compatibe sexually, and will have chemistry. Again, being generous, I'll say half of that 10%, so you're down to 5%. 1 out of 20 chicas will fit the bill. In reality, it's probably less than 2%. This is all very scientific stuff.
Good luck in your quest. My advice: forget this and just have fun. Treat them well, have alcohol on hand, be fun (not boring), be able to communicate, try to find what interests them, and you'll be surprised. It 's probably best if it happens naturally instead of trying to make it happen.