Staying downtown and no car? You like beer? If so hit up Collins Pub, Pine Box and Stumbling Monk.
I really like Quinn's up on Pike (Capitol Hill) for food. Good drinks, too.
Speaking of beer, spent half the day last Saturday at Chuck's Hop Shop Central District. Really great place if you have friends with kids who still want to drink beer out in public (aside from the odd beerfest). We had some prior-Seattlite friends visiting for the weekend, so they set up shop so people could come and go as baby nap schedules dictated. Drank tasty beers and a monster cuban sandwich inspired biscuit from the food truck.
A+++ would get drunk there again.