Check out the San Francisco Maritime National Historical Park. For 5 bucks you can board and get tours for some pretty sweet ships from all over. The tickets are good for a week, although I don’t think they check much. Right next to the fishermans warf.
We were hungry after and randomly went to Pompei’s Grotto. Great inexpensive lunch specials! For 12 bucks I got really yummy grilled salmon, pasta, veggies, and a cup or clam chowder. Yum Yum. Not bad for a tourist spot. The bar tender Steve was funny and definently knows his basebal.