Punishment is only temporary during Single Cell Productions Purgatory Reunion Show, to be held at Amos's Southend on April 16. The former bondage/S&M party returns for a night of decadent damnation. For those with movement on the mind, DJs (Spider, Prototype 9, Triskyl, Mixtress Krikett) provide a mix of dark electro/industrial sounds. But the more adventureous get wound up for the swinging rope suspension or a walk down the human red carpet. In addition, live performances and pain stations (Dr. Spankenstein is waiting ... ) keep the domination in flux. For more information, visit www.singlecell.us. $10-$15. 8 p.m. Amos Southend, 1423 S. Tryon St. 704-377-6874. .