We surveyed 13 convention centers in California to see what sorts of festivals, events and activities are going on. The public perception is often that these venues are geared toward special businesses, associations and outsider interests — and not locals quite so much. For those who have attended a convention center car show, travel show or other such popular event it’s clear to see that the convention center often is the only place around big enough to host sell-out festivals, expos and shows. Don’t overlook the opportunities for entertainment, education and fun in upcoming weeks at these convention centers: