Amazing any night of the week
I highly recommend this restaurant to anyone looking for either a romantic dining spot for a date or just a relaxed bar for a night out with friends. The food is great, the staff is friendly and attentive, and they make some of the best drinks in Manhattan. (Gin and tonic lovers, try the French75. It's amazing.) The artichoke is to die for, as are the frites, and the frisee salad is pure French bistrot. I have tried almost everything on the menu and have never once been disappointed. (The same goes for the cocktail list.)
Everything is reasonably priced (even more so for New School students, who get 15% off with a valid student ID). I'm saying reasonably priced by Boston standards; in Manhattan, this place is a steal. The atmosphere is great, not too loud (except around midnight on Thursday, Friday, and Saturday nights, but find me a bar that isn't), the music ranging from edgy to timeless. During the spring and summer, they open up the floor-to-ceiling windows on Sixth Avenue and have an al fresco patio. When the weather really starts heating up, there's nothing more refreshing than a Bar Six mint julip on the patio. Any breeze there is cuts right through the windows and cools down the bar tables as well.
One thing to keep in mind:Be smart about when you go. If you show up at 9:00 on a Friday night and the place is packed, expect service to be slower in the dining room; they only have a few servers on at a time, so when it's slammed, everyone is slammed. In cases like that, I'd recommend just eating at a bar table. They offer the full menu there and your service may be more prompt than it would be in the dining room at a peak time.
Word of advice: Their bar is fantastic, but it doesn't stay open until four. If you want to be there for more than an hour, I'd get there by 12:30. It's great as a first stop for your night out; you can get some drinks and a bite to eat and enjoy the relaxing ambience before stepping into the frenzy of the NYC nightlife madness.