[From the Bassline Wikipedia page] Bassline (sometimes referred to as bassline house, organ house, Niche or 4x4) is a type of music related to UK garage that originated in Sheffield in the early 2000s. Stylistically it comprises a four-to-the-floor rhythm normally at around 135–142 beats per minute, a strong emphasis on bass, and a pop music aesthetic similar to that of its precursor 2-step garage.
In the scene's early days the most prominent bassline club was the Niche nightclub in Sheffield, which became at the centre of controversy due to a police raid which resulted in the club's closure in 2005. The club reopened in 2009, only to be closed down a year later, and then reopened a third time in 2017. Like grime, which was developing concurrently in London, bassline was associated with violence, anti-social behaviour and criminal activity during the time of its rise to popularity, which contributed to a general lack of willingness among venue owners and the police to accommodate bassline events.