Islamic punk band (taqwacore) from California, in the 2004 novel The Taqwacores by Michael Muhammed Knight. They don't allow females into their shows.
The novel was turned into a 2010 film, The Taqwacores.
Bilal ibn Rabah was a companion of the prophet Muhammed, and was persecuted for his faith by having a hot boulder placed on his chest whilst tied down spreadeagled.
Taqwacore bands ran the gamut in attitude and ideology; there were groups like the Bin Qarmats and the Zaqqums whose lyrics and behavior lurked somewhere between social protest and juvenile disesteem, but also bands such as Bilal's Boulder that wouldn't even allow girls into their shows.