My first monger experience in Shanghai was at a club called Motown at the imfamous Tong Ren Lu. The night I went was on a Sunday and their club was upstairs and quite empty but there were around 7 girls of which three of them were hot.
I ended up spending a lot of money buying them drinks (lack of experience) because one of the girls (not so hot but with the best personality) kept playing with my cock right at the bar. I was the only customer in the bar.
They had a room with a curtian and we went inside and two other girls came with her. They all started rubbing me and said they would give me a good time for 550RMB. The good time was all three of them jerking me.
After that I bought them another round of drinks and asked how much to fuck all of them. They wanted 3600RMB plus a barfine and I said no way. I bought more drinks - LOL
It was getting late (around 1:00am) and it was clear they were not going to have any more customers. I was able to negotiate them down to 1500RMB for three of them with no barfine, they told me their shift was over.
We took a cab, went to my hotel and they all got naked. Basically I did each one of them while the other two watched. After each fuck, the new girl took some kind of alcohol wipe and cleaned my cock and put on a new condom. By the third girl my dick was kind of limp (I came once at Motown and once with the first girl). Actually the third girl was the hottest of the three and fucked like a starfish - claiming I was too big. That may have also been a factor in my limp dick.
With all that said, I don't think I will do two or three girls again because I am not going to DATY with any sauna/bar girl so all you really get is a show of the two girls doing each other at best. If that floats your boat then it's cool. Not sure it is worth and extra 500RMB.
Also depending on how many times you can cum in one session is also a big factor. I have heard of guys taking viagra and staying hard for hours. Maybe that might make it worth two girls. For me, the time the girl takes to remove the condom, clean you up and put on a new condom is down time that makes my dick soft. If I could fuck each using the same condom then maybe I would consider it.
Fluky