FRIDAY: >> Even though Harry Potter and the Order of the Phoenix is an obvious choice for the movie-going crowd this weekend, the Avalon Theatre — just north of the Potter madness at the Uptown — is showing Talk to Me, the new biopic on the life of famed Washington, D.C., talk-show host and activist Ralph Waldo “Petey” Greene Jr. 5:50 and 8:30 p.m. >> Unbuckled alumni The Vita Ruins celebrate the release of their…