People seek it out instead for a dish of aged lamb called the mutton chop. This is Keens Steakhouse, and it's been standing here since 1885. Customer: I brought my nephew, and he had the mutton chop.

Keens Steakhouse opened in 1885 ... Plus no museum has ever served us a massive, majestic mutton chop. Over the past 140 years, Keens has passed through many hands—most recently into those ...