From the mid-1930s for a period of some twenty years, American musicians were banned from performing in the UK by the British Musicians Union. The ban was in retaliation for a similar restriction in the USA which prevented British musicians from working in the States. It was especially frustrating for post-war British jazzmen who wanted to see and hear their American idols. However, one way for them to cross the Atlantic was to join the dance bands of Cunard liners such as the Queen Mary, Queen Elizabeth, Mauretania and the QE2, or Canadian Pacific vessels like the Empress of England and the Empress of Canada. The Cunarders were especially popular because when they had docked in New York, the musicians would have one or two nights free to visit jazz venues like Birdland on Broadway, just north of West 52nd Street in Manhattan, or clubs in Greenwich Village. Some even arranged to take lessons with American stars during their shore leave: for example, Bruce Turner took saxophone lessons with Lee Konitz.