I like 33 too. I find Nana a bit too full-on, noisy and aggressive. After an hour or so I've usually had enough.
The drinks are more expensive in 33, but they nearly all do happy hour til 9, which I'm told is why expat workers favour it early evening. Many take the BTS along from Silom and Siam Square.
BFs are higher too, but as the guys have said, there are ways around that.
I've found that the actual tip for the girl is no higher than anywhere else. 2k LT has always worked for me.
I had an amazing new years eve there on 2004/05. Maybe my one best night ever in LOS. Went into The Office about 7.30 and got talking to a real beauty who was new and (unusually) hardly spoke a word of English. The other girls were a bit concerned about her, worried that the punters might be irritated by her lack of English, as the norm is that they speak it quite well. I liked her so I told them I'd take her out for a while and bring her back. They said great.
I was starving so I took her to soi 50 where there's an unbelievable place called Oishi that does a set-price all you can eat sushi and teppanyaki. Well recommended! She was a bit bemused and apprehensive at first, but once she finally grasped that all you can eat means just what it says, she ate enough to last till February.
Then we went to the Luang Sum night market, which is good fun. Lots going on and lots of funny little shops, not only the usual tourist gear. I bought her a belt and a scarf, she bought me a wooden back scratcher. I also bought a toilet roll holder that looks like Albert Einstein's face. You pull the toilet roll out through a hole in his ear. Only in LOS!
Got back to The Office at about 12.30. There were no more than three men in there and all of them were drunk, sitting on their own and looking sorry for themselves. But then there were about a dozen girls, many of them stunners - and most of them drunk, dancing on the bar top and VERY affectionate! I think they were pleased that she'd had a good time and no trouble, and she was bubbling over with it.
Stayed till about 2 and, I must admit, spent a shitload on Breezers for them and beers for me, but at least they were regular prices, not LDs. Went back to my hotel with the original beauty and her two friends. Oh my gawd, what a night.
Just one note - I got the impression that quite a lot of Soi 33 girls come from in or around BKK itself.
I too will be back!