Wikipedia
Hammerjacks Concert Hall and Nightclub was a large concert hall in downtown Baltimore through the 1980s and into the 1990s owned by Louis J. Principio Jr. The club attracted many big-name national acts, but also showcased many rising stars in the music world. The bands ranged from punk, glam, and heavy metal acts most commonly associated with the venue (e.g., Guns n Roses, Kix, Ratt, Skid Row or Extreme) 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." Hamerjacks, however, attracted audiences with other attire as well. It was torn down on June 12, 1997 to make way for M&T Bank Stadium parking lot. Hammerjacks was billed as "The largest nightclub on the east coast."
A third version of Hammerjacks opened in a different location, which had formerly been used as a car wash, in Baltimore. It was then put under new management in 2004, but has now been closed.