If you're anything like me and usually in love with the musician performing, you clearly want to impress for that fleeting moment his eyes skim the crowd and he might catch a glimpse of you, whilst also preparing yourself for 2 solid hours of standing in a hot, sweaty crowd and not wanting to wither from those oh-so tight skinny jeans.
My ideal gig get-up would be a funky pair of leggings, preferably with extra loose elastic to allow for a couple of extra beers whilst you enjoy the evening! I'd pair those with a chunky knit jumper, with a loose tank underneath so if things get rowdy and you feel the need to de-layer it's easy to whip of your sweater and feel comfortable.
I love the selection from American Apparel and would happily choose pretty much any pair and wear them any day of the week. For a laid back concert, I'd go for this pair which are suitably attention grabbing and edgy but the classic monotone colouring keeps the piece wearable and avoids the try-hard trap which is so easily fallen in to.

Paired with a simple over-sized jumper it'll ease thrown-together style, as well as being comfortable and ideal to dance in - perfect for that next gig.
So think ahead and plan your gig garm before you head out to ensure you turn heads whilst avoiding the cramped, sweaty crowd suffering!