For a typical producer, the phrase "somewhere that's green" " to quote one of the best-known ballads from "Little Shop of Horrors" " refers to one place, and one place only: Broadway. If a producer is lucky enough to have the (admittedly rare) alignment of material and stars, the exclusive fiefdom of its 41 houses […] The post Opinion: 'Little Shop of Horrors' sticks to its Off-Broadway roots appeared first on Broa…