Located in the XV Beacon Hotel, MOOO, chef Jamie Mammano's swank ode to meat, serves many cuts of beef with amped-up sides - mushrooms with butter and brandy, fries with truffle oil and Parmesan. Where KO Prime pushes the steakhouse concept toward experimental, Mooo, on Beacon Hill, pulls it back in the direction of modern luxe. Mooo, 15 Beacon Street, Boston, 617-670-2515, mooorestaurant.com