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Some supporting bands may pleasantly surprise you and some may go onto being headliners someday, so be sure to be kind and attentive during their sets. If the band really stinks, just walk out. Don’t ruin everyone else’s time by loudly bashing them or talking through their set. Don’t make anyone uncomfortable or feel unsafe by flailing your body parts all over the place. It’s great to let loose, but it’s also very important to respect everyone else’s space too. Remember: your body is yours and their body is theirs. If you are near someone who has fallen, help them up. The ground is not a good place to be at a concert. People came to hear the music, not your voice. Try to save your commentary for after the show.
Show respect to the opening acts, even if you didn’t come to see them. Keep your hands and body parts to yourself. Get up quickly if you fall. Keep talking to a minimum.