I highly recommend The Prime Rib. Only two other locations (D.C. and Baltimore) so hardly a chain, and a swanky, supper-club experience unlike, Morton's, Ruth's Chris, The Palm, or any other expense account steakhouse.
True, a jacket is required at dinner, (they do have some loaners
) but for a (possibly) one-time experience
The Prime Rib is it. Be sure to get the crab Imperial as well as a (phone book sized) slab of prime rib, or any of their excellent steaks. Take a cab as the drinks are also behemoth sized.