Watch a movie with drinks and awesome seating for two at Sundance Kabuki Cinemas and then walk to Yoshi's for live jazz & dinner, or Sheba Piano Lounge for live jazz and ethiopian food or Dosa for awesome fusion south indian food and creative cocktails. Hope this helps!
Pizzetta 211 is really tiny and romantic. You can't make reservations, but you can drink wine out front while you wait.
Bar Jules in Hayes Valley is another favorite of mine.
Jeffrey Bar Jules...Yes. Get there early or get there late. If you're waiting for a table or seat at the bar, there's a little Greek place further down (east) on Hayes Street (Souvla, 517 Hayes) or 2 Sisters Bar & Books (579 Hayes) which itself is date-worthy for its bookish sensibility.