“The curtain may finally be falling for dozens of tenants of Carnegie Hall, whose studios helped form a Bohemia on 57th Street because of the many musicians, dancers, painters and other artists who lived in them. Carnegie Hall announced yesterday that it would embark on a major expansion that would create more offices, rehearsal and practice rooms and space for large ensembles, as well as renovate backstage areas. The plan would gobble up all of the studios in the building and its two towers, Carnegie said, and would mainly serve Carnegie’s expanding educational wing.”