An all too rare thing even in San Francisco restaurants, Tres Agaves is a stylish, full-service Mexican affair with a buzzing bar scene. In a cavernous industrial-chic space with exposed brick and pipes punctuated by bright spots of Mexican art, creative professionals gather for one of the liveliest happy hours in town. While the upscale fare is hit or miss, the fiesta is at the bar where expert mixologists make the city’s finest margaritas. Don’t miss the extensive menu of tequila cocktails and, although the vibe is casual, reservations are recommended even on weeknights. Tequila at its best and dressed-up Mexican fare are served in the city’s most stylish Mexican restaurant. A stylish young crowd gathers to sample tequilas and dig into spicy shrimp, shredded beef, and chunky guacamole in this cavernous, industrial-chic space just around the corner from AT&T Park. Order a Tres Agaves margarita. The limes are imported from Mexico, and the owners are tequila experts.