ohhh just saw you said saturday to thursday. where are you staying at, that way i can recommend places by you. but as for fast food joints in-n-out, not sure if you have sonics where you live. habit burger, carls jr (since most are hardees), jimboys. ohhh you need to go to a adalbertos to get a california burrito and carne asada fries. besides SD, sacramento is the next best spot for those items.
if you are going to sf i say go on saturday, weather is supposed to be really nice this weekend in sacramento and the bay.
the farmers market tobra is talking about is actually on sunday. i live like 2 blocks from it, but its dope.
for barbs/pubs to hang out downtown i would say shady ladys saloon, r15, de vires pub, streets of london are all good choices. each have a different vibe though.
shoot me a PM and let me know where you are staying and want to see/go then i can recommend some spots. i'll be helping my cousin paint her house fri-sat and out of town mon-weds or else i would try and meet you up somewhere.
and
http://www.yelp.com/sacramento is your friend