Reno has casinos, indoor smoking, some golf courses, the usual. It's a smaller version of Vegas, with abundant free parking.
Sacramento's tourism increased 4% since last year, dunno how that happened. Tourists come to Sac to see Old Sacramento, Railroad Museum... Not much to see in the Winter. If you have some money, you can buy some Kings tickets.
Oakland has the Raiders, UC Berkeley, Some hills, golf courses in the hills...
San Francisco has the wharf, the Niners, some more golf courses, some clubs, etc... If you could, drive up or down the PCH for some really nice views and visit some nice places. You can drive to wine country and try some wine? 🙂
In the last month, I've driven from Sacramento to LA, on I5, and each way takes about 5 hrs going at 85-90 MPH, with one break for gas/piss/rest/etc. Everyone goes fast and if you don't you'll get passed by the bigrigs.