Mexican restaurants are a dime a dozen in most American cities, and Las Vegas is no exception. In and around the famous Strip are a peppering of taco joints and burrito bars, most serving up the usual fare. But as with most things, the City of Sin has taken Mexican food one step further. The Cosmopolitan of Las Vegas has no less than 17 restaurants — a number that doesn’t seem so high once you consider its 2,995 rooms. Deciding where to eat can be a test, but as a serious aficionado of Mexican food, I had my heart set on guacamole and tacos. The Cosmopolitan of Las Vegas had bigger ideas. What’s the only thing better than Mexican food? Mexican and Chinese food.