Mad Gatherings are overnight (sometimes multiple nights) camping parties run by Broseph, Brolum and Broheim (who together make Aros, the god of parties).
The name originates from a blue letter "m" which was stolen from a sign that originally said "Home Farm / Business Park" and now, thanks to the Aros, says "Hoe Farm / Buns". (All the letters removed were removed by Broseph and the famous "m" is now in the possession of Brolum)
Mad Gatherings are often host to some drug usage, drunkenness, sex and firespinning and firebreathing.
They are not to be missed if you ever have a chance to go.
Person1: Dude, you going to the next Mad Gatherings?
Person2: The next MG? Wouldn't miss it for the world!