mods, feel free to move this if it's in the wrong place

As my band gets closer to playing "real" gigs, I'm left contemplating what to wear for the show's. I'm completely ignorant when it comes to this kind of stuff. Here's a little background if it will help. The name of the band is Big Daddy Green. We play somewhat heavey stuff in the vein of Godsmack, AIC, Ozzy, and G'N'R. I'm a fairly large guy at 5'9" 280lb.'s



I'm not looking to get all dressed up, just looking for some pointers. Thanks

BTW, wish me luck for New years. We're going to be playing at some big party. No money involved, just for practice/fun.