Yeah blind booking is a little tricky because essentially the only reason you would blind book is if the girl is a stunner on the ad or you read a review praising the girl. I generally do 2 things for blind bookings:
If im interested in booking i always try and go during a quiet time like before 3 pm or after 8pm so its more likely i will see the girl i was gonna book. This gives me a chance to see the girl in action during a line up and theres no commitment. The problem i have with blind booking is that maybe the girl feels that she already has your money and is less likely to provide a great experience.
I always sus out the joint before i walk in. Ill typically sit in the parking lot in my car while doing this. Instead of booking i call and ask if the girl im interested in is working. If she is i'll typically walk in within the minute and see the line up. This allows me to confirm the girl im interested in is working and available but i can always bail if shes not up to my standard or go with another girl instead thats to my fancy.
Generally if part 2 is about to start and she isnt to my taste ill just simply refuse to pay for it. Like you can suck me off for free but i'd rather save my coin. I typically tell the girl i dont have any more money in my pocket. I'm not much into RNT just because i dont see it as having much value imo. Alot of the time its just a cute girl who strips and gives your cock a tug. Like i can typically get that from the Mrs or even on pornhub for free. Maybe thats just me though but that being said i do love a good massage.