Is there a place to buy food or can we bring our own lunch?

There's a great little chinese restaurant down the street. Reasonably priced. Tsing Tao 3107 Clement St #1615, San Francisco, CA 94121

They have a cafeteria inside. If you bring food you might not be able too take it inside with you. https://legionofhonor.famsf.org/legion/visiting/legion-honor-caf