MAP's are always a hit or miss. However, the beauty of them is that you can politely ask to see who's available, before you hand over any money. Its totally ok to walk out and come back another day.
There is a good review site for MAP's but its not cheap. I used them before until they raised their membership costs, so now I have to go in blind. But I ask questions and am not shy. I will ask them upfront if they provide extras, after I've seen the goods. Most could tell that I'm not LE and that its not my first time. I just do it politely and respectfully.
Here's my usual routine. I've been doing this for a VERY long time.
Ok, so once in, house fee is usually 50. I give her 100 and leave another 100 on the table. When she returns, I tell her to leave my change on top of the hundred I placed on the table. She gets the message and knows she's getting 150. No talk about fee at all.
I tell her I'm not there for a massage, so straight to the BBBJ, followed by the usual acts and positions.
Now, if I'm lucky, maybe she'll go for CIM. Most don't, but I try. Once I'm ready, I take the condom off and ask for more BBBJ. She'll either do it with no questions which means CIM may be on the table, or she'll say "no cum in mouth". Ok, fair enough. I'll blow on her tits. Or, maybe she'll just say no altogether in which case I finish the normal way. If they speak any english, I'll ask questions afterwards about the place, other johns, their personal life, etc.
After years and years of doing this, with many failed attempts, wasted cash, horrible service, ugly women, awkward situations and even almost getting caught by cops a couple of times, I've fine tuned my approach. I've asked a Sheriff buddy on the rules and traps they set, the legal parameters on what gets you caught, and even what NOT to say and do. I told him I was just curious, but he knew.
At this point, I have enough experience and know what I want, and I have no problem asking for it.
This is JUST my personal experience and opinion, so take it for what it is. Everyone has their own way, so please share yours.
Thanks