tagging a building used for exhibitions, concerts, performances etc

I'd like some advice on a node I created yesterday (my first ever edit). The name literally means "large hall" and it is used for several kinds of cultural events. Never mind that it's part of a larger cultural center and not a separate building -- it has an identity of its own including a website and my question would apply even if the place was separate, it surely applies to many similar places. As I said, it is a space hosting various cultural events, so none of the categories in JOSM apply -- or rather, several different categories would apply over time. (Some functions of the place, not all corresponding to categories I've seen, are: theatre, concert venue, exhibition space, fleamarket, and more.) It is known under its name as a cultural location so it would be good if it could appear on the map with a label. Currently the node is there but not shown. (At least I assume the reason for this being that I created it as an uncategorised node.)