Fusion, fission, energy and virtuosity reign supreme over coming holiday weeks as jazzers beyond genre constraints fill New York clubs. Starting tonight (Dec. 9) double-necked guitar madman Dave Fiuczynski fires up Iridium with ripping alto saxophonist Rudresh Mahanthappa and jam-band idol John Medeski on keybs; jazz sambas and tangos, ex-Milesian Mike Stern and smooth trumpeter Chris Botti, soul-drench organist Dr. Lonnie Smith and the Bad Plus follow. Details here, at my new column for City Arts-New York. And below — Fuze, vocalist Dean Bowman + Roy Hargrove knock out Miles Davis’ “What It Is” from Decoy (1984, and still state-of-jazz-funk).