If you enjoy a cocktail, see if there is a spot at the Nobel Experiment (https://nobleexperimentsd.com/). 

First time in San Diego for me, but I can't wait to see what they have to offer.

San Diego, food wise, is known for fish tacos and craft beer. Throw a rock in almost any direction and you can find something good. Tin Fish and Oscar's are the closest to the conference for tacos. Best beer is subjective, here's a good list: https://www.thrillist.com/drink/san-diego/best-breweries-san-diego

If you're into beer and have time to get away from downtown, Modern Times and Stone have beautiful brewery tasting rooms.