PHOTOGRAPHY: Photolucida, an international arts nonprofit, presents Contents: Love, Anxiety, Happiness and Everything Else Critical Mass 2011 (not any relation to Critical Mass, the bike event), a juried exhibition featuring the contest's top 50 emerging and mid-career photographers across the globe. (6 to 8 p.m., Rayko Photo Center, 428 Third Street)

FOOD: Get some tasty nibbles and bites from restaurants such as Ame, Hog & Rocks, Tacolicious, Local Mission Eatery, Nojo, Dynamo Donuts and lots of other great restaurants as part of Taste of Potrero, a benefit for Daniel Webster Elementary School. Then wash it all down with cocktails provided by Comstock Saloon & The Homestead. (6 to 10 p.m., SOMArts Cultural Center, 934 Brannan Street)

ART: Hayes Valley's Patricia’s Green plays host to Future's Past, a new sculpture by Kate Raudenbush, presented by the Hayes Valley Arts Coalition (HVAC) and Hayes Valley community members and the Black Rock Arts Foundation. The opening event will feature a performance by Cello Street Quartet and Off The Grid food vendors. (6 to 8 p.m., Patricia's Green Park, Hayes and Octavia)