Music stands are fine for rehearsal, coffee house gigs, session players that regularly have to sight read parts, or you're one of those psychos that plays in 3 or 4 bands at once and can't remember everything. For a bar band playing covers? Rookie move. Ranks right up there with leaving your clip-on tuner on the headstock. Very un-rock and roll. Learn the songs. If you can't call up 30-40 songs from memory you need to practice more.