The Musicians’ Union Hall in Kansas City is famous worldwide for its jams — locals and visiting greats blowing into night, long after the clubs shut down. Dizzy Gillespie and Charlie Parker started to cook up the bebop sound at Local 627. But a recent crackdown by city liquor authorities has left fans wondering if Kansas City jazz can still be the real thing. KCUR’s Sylvia Maria Gross checked in late one Saturday night. Actually, it was Sunday morning.