The West End Museum, The Langham, Boston Hotel, and the British Consulate General in Boston cohosted a party over the weekend to celebrate the 50th anniversary of the Beatles’ first performance in Boston. Guests at the event at the Langham’s Bond lounge included the cover band the Nowheremen, EMC vice chairman William Teuber, City of Boston counsel Eugene O’Flaherty, New England Council executive vice president Larry Zabar, and Steve Ramsay of the Microsoft Technology Center. The Langham is displaying a Beatles photo exhibition in its lobby through Oct. 12.