They were a group of the most extreme metal heads (a.k.a. "The Old Bridge Metal Militia") who lived in the town Old Bridge, New Jersey. They would let bands who were touring the area, stay at their houses when they were in town for a gig. Bands like Slayer, Metallica, Motorhead to name a few. They would get these bands to play at parties in their basements.
The Old Bridge Metal Militia were even immortalized in song. The Megaforce compilation Born to Metalize has a track called "One Night in Old Bridge," while Blessed Death had a song called "Knights of Old Bridge."