Gyu-Kaku [34 Cooper Square, New York; Menu]
A great place for groups, but also somewhere you could dine alone, this outpost of the Gyu-Kaku chain has some of the most delicious BBQ south of 32nd street. The menu has a lot of options for what you can throw on the grill (you have to cook it yourself), but I would recommend sticking mostly to the beef. The best option, of course, is anything Kobe. We had the Kobe Kalbi and it was simply fantastic. Almost as good however, and much cheaper, was the Harami, marinated skirt steak. A third good beef option is the regular Kalbi. Be careful when you are ordering because each portion is not that big and the tally does add up. It's worth it though. And if you can get there early or late, they have happy hour pricing on one meat each day Monday-Thursday. There is a second location in Midtown.