A gathering, party, or bar where the vast majority of attendants are straight males, who, not unsurprisingly, wonder where all the females are.
DJ Stay-Funk's party was lame, nothing but guys...a real viking ship.
MC Musty went into the pub to scope it out for the group. A minute or two later he comes out and tells the rest "Screw this place. It's a fucking viking ship in there, nothing but tools."