The Hells Angels clubhouse has been at 77 E. 3rd St in the East Village since 1969 but according to EV Grieve they appear to be selling that clubhouse. Public documents note a Memorandum of Contract, the form that precedes a sale, from December 21 that was signed by Bartley J. Dowling, president of the NYC Hells Angels chapter, and the purchaser, Nathan Blatter of Whitestone Realty Group, with a spring move planned. For more on the history of the building, head to EVG.
The block the clubhouse is on was often referred to as the safest block in New York City because of the Hells Angels' presence. The clubhouse is featured in documentary Hells Angels Forever, which you can watch clips of below.