IMHO, (Remember, this is an opinion)
Dancing, Mascots, Banners, Flags, Costumes, Loud Music etc., etc., etc.
This is not a "professional" meeting, this is an EVENT. Think of it that way, and you will understand, WE ARE HAVING FUN, and we treat each other with Gracious Professionalism. I believe any Corp. Sponsor will easily understand and agree. (Heck, you might even catch them shuffling to the beat, in a suit
)