Pacifico is a very popular Mexican restaurant in Carroll Gardens. It can be quite crowded on the weekends, they do not take reservations. But the wait is worth it. If you don't want to wait, go during the week. It is casual, inexpensive, and very good. My favorites are the nachos or guacamole to start and the enchiladas or quesadillas for the main course. The drinks are also very good here, especially the margaritas. It is cash only.