Charlie Day and Glenn Howerton cut up yesterday in a conference room at Harrah's Chester casino as they shot scenes for the sixth season of It's Always Sunny in Philadelphia with Phillies players Ryan Howard and Chase Utley.

Day (Charlie) was impersonating Frank (Danny DeVito) at a Pennsylvania SPCA banquet. The twist here is that the Mac (creator/star Rob McElhenney) is a big fan of Utley's. Though McElhenney didn't get to act with the second baseman, he got to chat with him in his executive producer's role.

Danny DeVito and a bunch of Sunny cast and crew took in last night's fête de la music at the Sofitel: live jazz duo out front, a DJ in the bar, and comp hors d'oeuvres. The Sunny folks are in town shooting today.