Conversation so far:
Who is S.I.M. with DJ Paul?
In early 2013, DJ Paul focused on performing as a DJ, and created a DJ duo, called S.I.M. (Sex is Mandatory)
Who is Da Mafia 6ix with DJ Paul?
Da Mafia 6ix is DJ Paul, Infamous, Crunchy Black, Koopsta Knicca, and Gangsta Boo. The five of them reunited as Da Mafia 6ix, planning to release an album in 2014.

Question: Who is the Killjoy club?
Self-contained rewrite: Who is the Killjoy club with DJ Paul?