I live here, but I haven't mongered at all. I have checked out some of the info though. In GDL... you can get action around the Mercado San Juan de Dios. Go to Avenida Gigantes and 5 de Febrero (or is it 5 de Mayo, either way it's two blocks east of Calz. Idependencia) there is a house with an orange front there a re hookers there. Also, the bars and streets and hotels in the immediate area have SGs occasionally. Afternoons and evenings are best. Also check Esteticas Masculinas (Massage Parlors) in the Seccion Amarilla for action. Or ask a taxirero for a Bule (strip clube where girls are likely putas as well). Avoid going to major strip clubs unless you have lots of cash. (mainly for rich pubescent mexican kids and gringos) Chapala is lame because most of the residents there can't get it up. Also, GDL is good for hooking up with local girls if you are white and young or good looking.
Have fun, and post if you have more questions.
Coahuila