5/6/21: Publicize virtual events in one metro only

Although virtual events can be viewed from anywhere, FullCalendar will only publicize them in one metro area, based on the city entered. If you submit a virtual event in more than one metro, the extra submissions will be refunded and changed to “draft” status. Some places we post to don’t allow the same entry in more than one location, and some don’t want even virtual events outside their coverage area, and we need to follow the guidelines of each place we post.