Coming for a trip on Dec. 26. Two nights at the Orchard in SF, two nights San Simeon, one night Monterey and last night Dec.31 staying in Marina District. We are in our late fifties and I chose Marina District because we haven't spent any time there before, and we have reservations at one of the motor lodges in the district (we'll be returning our car the next day when we fly out). Is the Marina District too young and hip for a couple of relative duds? I think we'll enjoy walking around the area and besides the water and the views, will just need some place casual to eat and maybe a bar or two. Should we go back to Union Square for our last night?