photo credit: UPROXX It was a LEGENDS ONLY type of vibe for the seventh annual Glasper Jam at L.A.’s Teregram Ballrom last night. In collaboration with UNION and UPROXX, Robert Glasper held his exclusive pre-Grammys, impromptu jam session experience for fans and music connoisseurs alike. Promoting his current project ‘Fuck Yo Feelings’, Glasper didn’t hold…