New York is the culinary hub of America, with all sorts of "cutting edge" choices available to the discerning diner. But then, there are the classics. And in the 21st century, when something that's been around for less than a decade might seem like "a classic" to some, there is Keens Steakhouse, established in 1885.
There is nothing "cutting edge" here, just classic, old-fashioned huge slabs of beef (and lamb), dry-aged to perfection and perfectly cooked, with all the classic sides -- baked potato, creamed spinach, an Iceberg wedge salad with blue cheese, etc., etc., etc.
Speaking of classics, you know that opening scene from The Flintstones cartoon show on TV? The one where Fred is in the drive-in, and the waitress brings that Brontosaurus steak and sets it down on his window tray, and it's so heavy, Fred's whole car tips over on its side? THAT was the size of my wife's Prime Rib! And it was perfectly cooked, *very* rare, just as she likes it. My T-bone wasn't all that much smaller. Both were so huge that we had to call our hotel and ask that a small refrigerator be set up in our room for the leftovers.
The food was wonderful. The wine list was, somewhat surprisingly, a little limited, but with some great values if you know where to look. The decor and ambiance was 19th century New York. The service was good. Dress code of the patrons ranged from untucked oxford shirts and blue jeans to suits and ties. And the prices, compared to other places in Manhattan, were quite good.
I think you need to be in the right mood for this place, rather than the sort of "modern" steakhouse that will cater to your every whim, but we had a great (and delicious) time.