Jason L and I stumbled into Hachoir after a night of drinking - and I am happy to report that it was an excellent decision. We ordered the slider trio- chicken, pork and beef. The sliders were tender, well cooked, and flavorful. One thing of note is the waiter did not ask how I wanted my burger. The beef patty was served medium, I would have preferred medium rare, but it wasn't a big deal. We stayed away from any alcohol, and the waiter was kind enough to continuously fill our glasses.
Although we didn't try it ans can't vouch- many patrons seemed quite satisfied with their tartars and fois gras.
The atmosphere, was a club meets high-end tavern. It was definitely dark, and EDM like music played on the house speakers. Hachoir is probably an excellent drinks out with the girls spot.
They are open til midnight almost every night of the week, and you can book reservations on their website. Walk-ins are welcome. Jason L and I did not have a hard time snagging a table at 10pm on a Sunday night.
I'd go back.