DANCE: Get a free beginner salsa lesson at Salsa in the Square, a salsa music and dance festival happening every third Wednesday through October. Immediately following the lesson, test your skill to the live sounds of Anthony Blea y su Charanga.

6 p.m. // Union Square // free

PODCAST: In Get Smart Radio show #9, entitled Food Fight!: The Challenge of Making Food Taste Good While it Saves your Life... host Deborah Pardes joins Dr. Daphne Miller, author of The Jungle Effect and Chef Traci Des Jardins, proprietor of Jardiniere, Acme Chophouse, and Mijita, in which they will discuss indigenous diets and specific foods and food combinations that Dr. Miller has found to fight specific modern diseases like heart disease, colon cancer and diabetes. "Every time she mentions a food, Traci will provide easy preparation tips and recipes to make sure we can easily integrate good food into our lifestyles." If you can't attend, then listen live.

7 p.m. // Coffee Bar (1890 Bryant St) // free

DESIGN: As part of SF Design Week, Pecha-Kucha SF and IDSA present Pecha-Kucha Night, a monthly design "show and tell," in which eight to twelve designers in the fields of Architecture, Industrial Design, Graphic Design, Motion Graphics, Fashion Design, and Animation each present 20 images of their work to the public. This month's theme is "Cause."

7:30 p.m. // Harlot (46 Minna St) // $5 donation