Wondering where to take that date who loves to vacuum seafood when you live in a city by the bay? How about the teeny-tiny oceanic endeavor, Bar Crudo? This intimate, two-story restaurant has the same basic layout as the adjacent Tunnel Top, meaning the upstairs has a cuddly, attic feel (although Crudo is much cleaner and better lit). So this is the perfect spot to nestle next to a significant something or other while slurping oysters, devouring an inventive lobster salad, or partaking in a plate of artistically displayed sashimi. The place has zero pretense — all the creativity here goes into the food, not lavish displays of d?cor — so you can concentrate on both the entr?es and the views of Bush Street from up on high.