Recap / Regular Show S 04 Ep 10 TGI Tuesday

Mordecai, Rigby, and Eileen plan a party for Margaret, who may be transferring from junior college, and must contend with the ghosts of 1980s DJs who consider the park's ballroom a sacred ground.
http://tvtropes.org/pmwiki/pmwiki.php/Recap/RegularShowS04Ep10TGITuesday