Add slam dancing to activities banned in Boston.
Police recently cited a city club for allowing violent mosh pit dancing and vowed a crackdown on what they called "dangerous behavior" and a "public safety hazard."
Police cited the House of Blues for a license violation because of a mosh pit that broke out during a Feb. 21 show by Flogging Molly.
Police say 60 concertgoers engaged in slam dance.
Police say the dance violated safety rules and the club was cited because security did not intervene.
The club has agreed to put up signs that say mosh pits are banned.
Brian Fair, vocalist for Boston band Shadows Fall, called the clampdown "ridiculous."
Musicians say slam dancing is part of the metal and hardcore culture.