Ideas from here, and here.

----Other suggestions from friends (thanks so much, guys!)-----

• Mission district for hipsters, amazing tacos and pupusas, and funky shopping
• Haight Ashbury for authentic hippie culture and the best thrift shops in the Bay area
• De Young museums for cool art exhibits
• Good eats:
  - Ikes sandwiches (Castro - the district also have the best bars and a cute and vibrant gay scene. Nice boutiques and very cool people)
  - Burma superstar (Inner Richmond)
  - Umami burger (Pacific Heights)
  - Brenda's soul food (Tenderloin)
  - Mama's cafe
  - Bi rite ice cream
• Chantal Guillon
• Golden Gate park
• Palace of fine arts
• Sutro baths
• Turtle hill
• UC Berkeley campus:
• - going up the campanile
  - going up the big C to see the sunset on both sides of the bay
• Alcatraz - the prison island - take the ferry, and go on the night tour, even though at an extra charge, and will need to book at least a month in advance.
• View of Union Square from the top floor of Macy's Cheesecake Factory - plus try their cheesecakes
• Concert/ballet/theatre with SF symphony/ballet/theatre
• Ghiradelli square and ice cream/desserts/chocolate
• Seals at Fisherman's wharf and seafood
• CA Academy of Sciences - events every Thursday night for 21+.
• Pier 39
• the Mission Dolores church
• the painted ladies at Alamo square.