In the heart of Market Square, you can eat Mexican fare or oysters or both while surrounded by Spanish tile and light music. Try the fajitas, enchiladas, or puffy tacos, seated inside or on the patio under colorful umbrellas with a great view of the city. Want it all? Go for the Fiesta San Antonio appetizer plate for yourself or to share with friends over a fantastic array of margaritas—it's what the restaurant is named for, and the moniker is justified. There's plenty of live entertainment, and mariachis will serenade your table upon request (and please do tip a couple of dollars).