We have friends visiting from out of town and we want to do dim sum with them this Sunday. We are looking for a place we can walk to from Union Square, or easily accessible by Muni, reasonably clean. No, we don't want to pay for Yank Sing. We will be 4 adults and 4 children. Our favorite place in the East Bay (close to where we live) is Hong Kong East Ocean in Emeryville. About ten years ago we were regulars at Gold Mountain in Chinatown. We usually travel to the Peninsula for the good stuff, but that's not an option this time. What is good these days *in* San Francisco? Thanks in advance for your help!