Always make sure you come in with absolutely no money to your name, make the employee get the ladder and pull down several high end basses for you, and then go home and complain online that they turned down the volume on the full stack you were slapping through.
EDIT:
Went into GC the other day, some high school kid was playing, badly, on the acoustic drum kit (as opposed to the 6 electric kits they had ready to go with headphones and sticks). He must have played for 45 minutes, jamming to music through earbuds, then had the audacity to 'beach and moan' when the drum dude asked him to stop. Talked under his breath the whole way out.
Pretty much, just don't be that guy.
EDIT:
Went into GC the other day, some high school kid was playing, badly, on the acoustic drum kit (as opposed to the 6 electric kits they had ready to go with headphones and sticks). He must have played for 45 minutes, jamming to music through earbuds, then had the audacity to 'beach and moan' when the drum dude asked him to stop. Talked under his breath the whole way out.
Pretty much, just don't be that guy.