Sean "Diddy" Combs and Vivica A. Fox dropped by the Vault Ultra Lounge (470 N. 2nd) after Saturday's Joy to the World gala at the Ritz-Carlton. Comedian Kevin Hart and rapper Meek Mill also partied late at the Vault Saturday...Danny DeVito and wife Rhea Perlman dined Saturday at Davio's (111 S. 17th) where they had a nice bottle of red...Jamie Foxx stopped by R2L Friday night before heading to Vault for his record-release party.