Justin Bieber was persona non grata at the hottest nightclubs in Miami this past weekend -- they ALL refused to let Bieber inside ... because he's a bigger headache than he's worth.
Club sources tell TMZ, Bieber's people called ahead last week, asking to reserve tables at LIV, Story, and Adoré while the Biebs was in town -- but the singer's camp was denied at all 3 locations.
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