Niceto.
but they have metal detectors sometimes. although the last time I went, it didnt even beep at my swiss army knife, and I carry a pretty big swiss army knife.
I like a lot of the techno cumbia, stuff like Zizek- and they play at a variety of clubs, but Niceto most often.
you really need to track specific bands and djs, and go to their facebook or myspace pages, to find out who is playing where- I have seen cumbia hybrids at a lot of different spaces around town.
here's a link to an older mixtape from El Remolon, another cumbia digital zizek guy- more of a dub/tropical mix, I like it a lot http://zzkrecords.com/wuba2/usr_fil...pe_Vol._4_-_El_Remolon_Pibe_Cosmo--file_6.mp3
soundcloud.com has all of the newer stuff people are putting out, check it out, plenty of music there
don't forget about Damas Gratis if you want villera!