I had the pleasure of eating at La Cumbamba (Columbian) the other day and I found it to be a rather fun and interesting dining experience
The food wasn't exactly the greatest, but it was certainly very wholesome and yummy (on a scale from 1 to 10, I'd give it a 7.25); and although some people weren't impressed with how the food was presented (sloppy-combo-platter-type-deal), i thought it was delivered with a special, authentic flair.
There is no menu (or at least there wasn't the night I dined there) - so you get what you get. That night, they served us broiled chicken over some black beans, rice, salad (peachy vinaigrette dressing), cabage, beats and some other stuff no one recognized. I thought it was pretty good.
It's ok to bring your own alcohol if you don't enjoy sangria, which is the only type of alcoholic beverage they're allowed to serve (?). I definitly don't mind because byob makes the dining experience pretty affordable.
Overall, I had a great time. It was like eating over at a friend's house and trying someone else's mom's cooking.