The restaurant just updated its Facebook page:
Our big thanks to @FDNY. The fire that broke out last night at @MonoMonoNYC was quickly put out and everyone is safe. There was some water damage, so we'll be closed for a few days to make repairs. We'll be back stronger than ever! Stay tuned.
Updated 7 p.m.
DNAinfo has more on the fire...
• Fire not considered suspicious, per authorities
• Most of the restaurant's extensive collective of jazz LPs were thought to be OK
• "The heat from the blaze was so intense that it knocked out windows to the Hells Angels' East 3rd Street headquarters, which sits directly behind the restaurant.
The biker gang was having a loud barbecue in their backyard when the fire broke out, according to neighbors."