Like childbirth, roller derby is an all-women’s sport that combines speed and strength, and typically ends with a doctor slapping someone to life. Take on a spectator role without worrying about the cost of diapers with today’s Groupon: for $7, you get one adult admission to Duke City Derby at the Albuqurque Convention Center on May 7 (up to a $15 value). Kids 12 and under are admitted at no cost.

Duke City Derby couples the perilous nature of roller skates with padded and tatted ladies primed for a night of full-contact racing. Hunkered into general-admission seats in the Albuquerque Convention Center, spectators pack in for a derby double-header, as the Taos Whiplashes and Derby Intelligence Agency tussle at 6 p.m. before the Ho-Bots face off in an 8 p.m. donnybrook with the Santa Fe Disco Brawlers to determine league standings and which team has to skate the next match dressed as bumblebees. Of-age fans can celebrate victories or soothe memories of bone-snapping bashes with a beverage from the no-frills bar.

Originally formed in 2005 by 10 ambitious skaters, Duke City Derby grew into its membership in the Women’s Flat Track Derby Association. The skaters earned national recognition when the league’s travel team, the Munecas Muertas, beat the number-one ranked team in the WFTDA Western Regional Tournament to earn a trip to the National Championship and the bronzed skates of their vanquished foes.