There are several excellent alternatives for vegetarians at the San Pedro Square, a 16 min walk from the Convention Center.
My personal favorite is the Impossible Burger at Konjoe, the first from the right below.
But there are great vegetarian options in both others (Vietnamese in the center, Nepalese in the left). I especially recommend the bryani from Urbon Momo.
And more beer,
Outside seating – with special arrangements for Sharks games, of course:
And there is vegan pizza (with tomato sauce instead of cheese) at the Pizza Bocca Lupo:
And last but not least in my favorites, Robee’s Falafel :