I see all these wonderful reviews for Barcelona, but is there anything for Madrid? It looks like I will be in Madrid for a couple of days and would really like recommendation. Especially if it's first-timer friendly.
Coming back to answer my own question w/ experience to pay it forward.
Calle Montera. Walk back and forth from the Plaza del Sol station up Montera and stop at the huuuge McDonald's. Some girls are aggressive, others are quiet unless you approach directly. Most all work out of the same "hotel" and start their rates at 35Euro. (Some days are 45) The difference is some of the girls will upsell you mid-coitus. Other girls are all-inclusive. Pretty much your mileage may vary. Got both types on my two visits. Be clear before hand. One girl was "The young girls are all bitches, pay extra money for tits, pay money for this. Me? You pay, you get everything I do, we fuck. We happy."
Haven't figured out "peak hours" the girl was unclear what I was asking. But I did get that sometimes girls will be out there until 4am.
TL/DR: Calle Montera. Lots of girls. The twentysomethings will upsell. A lot.