Hi:

There is a place in SF called, "Cafe International" The address is 508 Haight St. San Francisco, CA Phone # 415-552-7390.
They have open mike night on Fridays at 7:30 PM.

If you just go to their site on Google, type in Cafe International, San Francisco, CA. it will bring up their page and shows a map as well. YOu can always call the phone number earlier in the day to ask more detailed questions you may have about the club or directions. Or call the day before.

Will you have a car or using public transportation? Buses are pretty good in the city so you shouldn't have any problem getting around the city using the buses and or the BART system (rail).

Most hotels have info. about the buses, etc.

Hope you have a good time! Only in SF? Or will you be travelling to Los Angeles as well?