This rarely seen independent cult classic screens as part of the excellent ICA Cinematheque: Eye on I season. You can find the full details here.
Time Out review:
Film-maker Slava Tsukerman's personal comment on, er, the State of Western Man, magnified through a thoroughly unpleasant bunch of New York junkies, poseurs and twits. Claiming to subvert a host of Hollywood verities, Tsukerman unleashes a parasitic alien being on the New York smack'n'sex demi-monde. Junkies and sex fiends start dropping like flies, and not even the Bruno Ganz-alike scientist can stop the voracious bug. Tsukerman stops short of his original intention of offing the whole cast, allowing for an extraordinary fairy-tale ascension at the end, but his aim of highlighting social malaise gets happily mislaid in a bizarre, often hilarious melee of weird drugs, weird sex and off-the-wall camp SF. Close Encounters for acid casualties.
Here (and above) is the trailer.