NWR: San Francisco

My job is sending me to our San Francisco office to work for the week! I'm pretty excited to get out there, I've never been to California before. I'm leaving Mon night and will leave Fri night, and fly into Boston to meet FH and visit my FSIL's family. It'll be the longest FH and I have been apart in awhile! Sounds silly, but we do live together, I just have gotten used to seeing him every night, it'll be a long week. I'm looking forward to traveling though.

So have any of you visited San Fran before? Any tips or restaurants I should check out when I have my nights free?