In the late-1970s, Leeds was home to influential punk rock groups such as The Mekons, Gang of Four and Delta 5, who helped to shape the sound of post-punk. The scene's genesis began when Andy Gill and Jon King received a funded trip to New York City in 1976. As art students, the trip happened so that the pair could study in the city's art galleries. However, while there, they became aware of the punk rock scene that had manifested itself around CBGB. After returning to Leeds, the Sex Pistols performed at Leeds Polytechnic in December. Soon after the pair formed Gang of Four. The formation of many other groups by local art students, namely the Mekons, Scritti Politti, the Three Johns, Girls at Our Best! and Delta 5. Pop act Soft Cell also emerged from this cohort. The members of these bands often frequented the Fenton on Blenheim Terrace, with the most frequent venue being the F Club founded by John Keenan. Groups such as the Mekons rejected being labelled as "bands", instead likening themselves to an art project espousing Marxism–Leninist politics. These groups also subverted many gender norms within the British punk scene, by attempting to include woman as much as possible. Former Mekons and Delta 5 member Julz Sale said in "Music in Leeds vol.2" that no woman "ever felt unequal" in the scene. During this period, members of the scene often found themselves in physical altercations against fascists, neo-Nazis and members of the National Front, leading to Leeds playing host to many Rock Against Racism concerts. In the '70s, Leeds also housed the two first openly Nazi punk bands the Dentists and the Ventz.