Steinway Hall's piano basement...
is famous for being the home to tons of the highest quality Steinway pianos in the world. It is from this location that the world's great pianists would come to pick out the pianos that they wanted to use for concerts, including at places like Carnegie Hall. Located under Steinway Hall on 57th Street in New York, there are two main rooms filled with what must be 15+ 9-foot Steinway pianos (though I don't trust my counting abilities).