The Rio Grande has acquired something of a reputation in certain circles in New York for being
the place to obtain highly powerful margaritas on the cheap. Being somewhat skeptical of these claims--especially given the rather upscale location--I felt it necessary to investigate this for myself. El Rio Grande is divided into two sections: Mexico and Texas. The border is the kitchen area. Rumour has it waiters can escort you with a passport between the two sides, but this was not tested by my group. Both sides feature the same typical Tex-Mex decor and a small, but diverse menu.
The obligatory chips and salsa were abundant and very well-received. The Rio Grande serves up a selection of salsa dip for all tastes. The entrées are pallatable and reasonably priced for NYC, but the patrons come here mostly for the drinks. Margaritas, served in large containers, come in a dozen flavors and are all highly potent. Average drink prices range around $10, which is quite a bargain for Midtown. Even for the professional drinkers at the party I attended, drinking any more than two was deadly.
The clientele at El Rio Grande is mostly young urban types, given the restaurant's prime Midtown location. However, there were a few families and the restaurant is noisy enough to accommodate young children. The service at the Rio Grande was great. We had a group of 12 and were comfortably seated and given excellent attention by the entire staff. I would highly recommend a night "on the border" for those seeking fun and cheap margaritas in the city.