Driver hipped you to this, but I don't want you to forget that it's happening tonight.  This sounds like a righteous party.  These guys play what I'd call REAL old school metal (Dio, Maiden, Metallica, Ozzy) but they lay it down mariachi style.  I think they're going to rock the place tonight.  Videos and more after the jump.

The guys take traditional mariachi wear and "metal it up", or do they take metal stuff and "mariachi it up"?  Which ever way, mariachi music makes everybody want to party and when you mix that with old school metal, well, let's just say you may be a little late for work tomorrow.  Here's some videos of Metalachi doing their stuff live: