"Portofino" at 1318 Grant Ave San Francisco, CA offers a casual and trendy dining experience with outdoor seating and waiter service. The ambiance is vibrant, with positive reviews highlighting the fresh oysters, linguine with shrimp, and sizzling sardines. Customers appreciate the reasonable prices and friendly service, particularly mentioning the helpful owner and staff like Frankie. While some minor mix-ups have occurred with orders, the overall dining experience is praised for its chill and homey atmosphere. With a varied menu and tasty dishes like the lobster roll and Cioppino, "Portofino" is a must-try spot for those looking for flavorful Italian cuisine in San Francisco.