You may know that the US sucks for nightlife, as we are under the impression that it should end at 2:00am and Sacramento is no exception. If you're in Old Town, go to a Bar called Fanny Ann's. The bar is cute (the bartenders are usually cute too!)they serve great greasy burgers and fries, yummy drinks and a good assortment of draught beer. There is dancing on the lower level and the top three are for milling about and socializing. Good atmosphere, fun and relaxed.
Dress Code: tank tops, cargo shorts and flip flops or you can 'dress up' and wear jeans or a casual sundress. the key is informal informal informal.