I think the cardinal rule of hobbying is "be prepared to walk."
The number of places I've walked out of is probably 5x the number I've had sessions at. It's my money and my limited time. If it looks like I'm going to be rushed, I walk. If the girl doesn't measure up to my reasonable attractiveness standards (without some other positive factor), I walk. If the girl has even a semblance of negative attitude (and is not smoking hot lol), I walk.
I popped in to 67 Eldridge a few months ago, I'd never been. Mostly curious to see the famous Susan, but also to see the other talent. Girl who answered the door was not attractive, but I saw someone impossibly hot walking in the back of the store. Asked who it was, she said "Kiki." "Can I see her?" "No, busy. Come back in half hour."
So spent a half hour getting a delicious slice at Scarr's and came back. Kiki was lounging in the front, and I couldn't believe a woman this attractive was working AMPs, much less a budget shop like 67E. She took me to one of the small rooms, I got undressed and got on the table, trembling with anticipation. A few minutes passed and a man walked in speaking Mandarin. Susan popped in the room and told me Kiki was no longer available and did I want her or another girl. Susan looked all right, but a steep dropoff from Kiki, so I just said "no thanks", got dressed and left. No cursing, no glares, no drama, I just politely left. Unpredictability is a part of the AMP game, and the best antidote is stick to your guns and vote with your feet.
A month later, was in the area, popped in to 67E and asked for Kiki, was told "half hour". Enjoyed another delicious slice at Scarr's and came back. This time got a full Kiki session. Holy shit, she is the most attractive AMP woman I've been with. And very upbeat and professional, at no point discussed any kind of money, just smiled when I gave her $100 at the end. Service was basic though, just enough CBJ to get some wind in the sails and then FS with her eyes squeezed shut the whole time lol. If I felt like I had any kind of shot of getting GFE service from her, I'd be broke by now.