This place is full of  Lower East Side millennials, young parents in knit lids, muscled nice guys, and pretty people. The bar in the back (facing the kitchen) is topped with a Manga-meets-Tarantino how-to-eat-Ramen fresco. Old or young, you won’t be out of place here. A suit is not recommended, though if you must no one here will care but you.  You may see a stroller (well-behaved infants may be around). Everyone at the bar is eating. And like the manga on the wall, there is someone waiting for your seat at the bar, so you won’t want to linger. Watch, Order, Watch, Eat and Leave. There is not a lot of spontaneous conversation with fellow diners.  Bar staff (more a reference to where a waiter is stationed) is super solid and friendly. If you’re a first time visitor, go with what they recommend, including a little can of cold sake if you like that sort of thing.