Grilled Cheese Enthusiasts Unite! Gather your fellow grilled cheese enjoyers and make your way to San Antonio for the Grilled Cheese Fest on October 12th at the Historic St. Paul Square (1174 E. Commerce St in San Antonio, TX). Festivities begin at 1:00 P.M and wrap up later around 5:30 P.M. Be sure to head there for all the numerous kinds of grilled cheese from area vendors and enjoy the all day live music. Its the San Antonio Grilled Cheese Fest on October 12th at 1174 East Commerce Street in San Antonio from 1:00-5:30. Let's Get Cheesy.