Hammerjacks Concert Hall and Nightclub was a music venue in downtown Baltimore through the 1980s and into the 1990s, owned by Louis J. Principio III. The club attracted many big-name national acts, but also showcased many rising stars in the music world. The bands ranged from punk, glam, thrash and heavy metal acts most commonly associated with the venue (e.g., Guns N' Roses, Kix, Ratt, Skid Row, Extreme or Wrathchild America) to pop (e.g., Badfinger) and alternative rock groups (e.g., Goo Goo Dolls). The club was often frequented by hard core patrons and musicians donning big hair, leather, lace, spandex, and heavy makeup, and was considered a "hard rock shrine." Hammerjacks, however, attracted audiences with other attire as well.