Concert and jam session organised on the initiative of jazz pianist Dariusz Fijak (D. Fijak), creator of the satirical fan page for musicians PdM – Janusz's Department and administrator of Poland's largest group for finding jobs within music, currently with almost 42,000 members – Praca dla muzyków. The concert and jam session is meant to celebrate the 4000th meme, but D. Fijak's actual goal is to bring together as many great musicians and people as possible in one place.