I dun really have any problems with no of shots when booking a gal. Basically, it all voice down to how you treat the gal. But if bros that cannot communicate with them, would be abit tough. There is no written rules as to min 2 shots, but IF bro ask the mummy or papi before hand, then could avoid any unhappy experience. If bros are just interested in releasing their load, and dun care how the gal will feel, just ask before booking. Then get the number of the papi or mummy. If the gal later chu spot, just say u call the papi or mummy to check, or get them talk to the gal. But I feel this way ur bonk will not be enjoyable liao.
Treat the gal nicely, feed them, sayang them abit. When 1st check in hotel go 1st round liao. Then after dinner can have 2nd round. If you power and know how to rubba, before sleep can 1 more, before she go back can 1 more. But sometimes the gal also will shack out 1, so depends on ur luck. Normally I go for 2 shots on the day that I did the booking, then if next day wake up early and have "feel" will bonk one more time before she leaves. So if bros already got 1 gal can click one, next booking will have less problem. Just avoid booking different gals from same joint if u intend to RTF. I still remember the most enjoyable gal I had before, 3rd time booking her I was given 5 shots, nearly 精尽人亡. Happy hunting.