Ethnic/local dinner in San Francisco
Pazzia, a cute Italian place on 3rd between Folsom and Howard, might work. (You say "ethnic": what does that mean? Not American?)
Some people like Bong Su, a fancy Vietnamese at 3rd and Folsom, but I think other places are better.
Chaat Cafe is a decent casual Indian stop at 3rd and Folsom, and there's a Chinese place called Canton Restaurant on Folsom between 2nd and 3rd. Someone else on here recommended Yank Sing, but I don't know if they're open for dinner.
I also like TWO, a fancier restaurant serving mostly American food (but it's good) on Hawthorne Lane between Howard and Folsom.
Ah, the local food places. Adding records for them all:
22 Hawthorne St., San Francisco, CA 94105
49 Stevenson St Ste Stlv, San Francisco, CA 94105
311 3rd St, San Francisco, CA 94107
337 3rd St, San Francisco, CA 94107
320 3rd St, San Francisco, CA 94107
Mehfil Indian Cuisine
600 Folsom St, San Francisco, CA 94107
Cha AM Restaurant
701 Folsom St, San Francisco, CA 94107