Complex sentence: He promoted theatre clubs in Miami and worked with legendary boxing manager, Angelo Dundee, presenting black-tie boxing events, and was also active in charity work; with visits to Miami from Muhammad Ali, Prince Michael of Kent and Prince Edward.
Split into simpler sentences: He promoted theatre clubs in Miami and worked with legendary boxing manager, Angelo Dundee, presenting black-tie boxing events. Mike was also active in charity work; with visits to Miami from Muhammad Ali, Prince Michael of Kent and Prince Edward.