COMEDY: Ex-scientist turned comedian Tim Lee takes the stage at the Punchline. As NY Times reports, "The former biologist was Tim Lee. After completing his undergraduate biology degree at the University of California, San Diego, he worked at the Scripps Institution of Oceanography for a while before he realized he needed a doctorate to do the interesting work. But by the time he finished his Ph.D. at the University of California, Davis, he had realized he hated academia." Hilarious! $20, 8 pm, Punchline (444 Battery)

THEATER: The SF Fringe Festival kicks off its 20th season tonight with a great line-up of edgy, uncensored, and unjuried plays, including Radio Star, in which "Tanya O'Debra lends her voice to ten different characters while simultaneously staging silly sound effects in this filthy, filthy, dirty 1940's radio detective spoof." Check your local listings.

FASHION: For those of you who like clothes but aren't really into fashion, be sure to check out the Go Green” Sustainable Fashion Fair & Clothing Swap. To wit: "Join 'fashion therapist' Gail Baugh, Holy Stitch denim repurposer Julian Dash and more D.I.Y. experts for fashion help, games, prize drawings and, of course, a clothes swap, where you can exchange your denim, neckwear and t-shirts for new duds." 7:00 pm to 10:00 pm, $5, African American Art & Culture Complex (762 Fulton)