A few years ago we had the show in large convention centre with maple floor, drapes, etc., but it wasn't as well attended by the public. The arena is large enough to accommodate more tables, exhibitors, and viewers.
Weddings...usually in churches, temples, synagogs,...that sort of building. I've never heard of one in a hockey arena.
Mike, no one asked, " How does it open?" or "Where do you put the shell?" but there certainly are a few "dumb" questions.