'Rica Famosa Latina' Stars -- Hardcore Jiu-Jitsu Training ... At Famed MMA Gym

With so much violence on reality TV, the chicks from "Rica Famosa Latina" have decided to get the upper hand -- by training in jiu jitsu at an MMA gym where Ronda Rousey gets down!!

It's no joke ... after the massive BRAWL at the premiere party last year (video below) Sandra Vidal and Victoria Del Rosal decided it was probably time to learn how to fight.

So, they hit up the famous Gracie Barra Burbank Monday for some real deal training in grappling ... since most reality show fights end up on the ground anyway.

FYI -- the gym is owned by ex-UFC fighter Alberto Crane ... and they don't mess around at this place.

We're told the ladies learned everything from punch defense to rear-naked chokes ... and their trainer Donny says they were "pretty good" for having no formal training.

Senoritas ... you've been warned.