I have forgotten all of my high school German and all of the Japanese that I learned while stationed in Japan for 2 years but I do have my broken Spanish that I learned as a result of being married to a Mexican for 27 years.
It seems like Spanish is the second language of the U.S. and that spills over to strip clubs. The club where I do most of my clubbing always has at least 25% latina dancers. I rarely speak Spanish to them. Preferring to be ignorant of what the are saying. Meamwhile picking up some intel that they didn't mean to give out. Once in awhile, I will throw something at them in Spanish just for the shock value. The looks are wort it. LOL.
Anyhow I find that most of the Latinas speak enough broken English that I don't have to rely on my broken Spanish.
Your findings?
If your in manhattan, there really is no need for language in strip clubs since they all speak english anyway. Most it'll do is impress the girl and give you one less marking as a PL. Hey, the illegal russian may even want to marry you since you can understand when she says don't touch you since her english sucks donkey dick. In queens same thing, but less shock value and no brownie points well except when your speaking with that one heavily accented spanish girl who you can't understand because she only says some words in english.