While Hollywood usually works very hard to rob movie titles of their uniqueness, the producers of “The Supremes at Earl’s All-You-Can-Eat” have decided to leave things be, retaining the name of author Edward Kelsey Moore’s 2013 novel. The adaptation challenge is left to screenwriters Gina Prince-Bythewood and Tina Mabry (who also directs), who are tasked with fitting in as many of Moore’s subplots as possible. “The Supremes at Earl’s All-You-Can-Eat” is one stuffed viewing experience, with Mabry challenged to balance numerous relationships and moments in time, tasked with weaving together a study of friendship and devotion during the highs and lows of life. The material doesn’t always command attention, going where many soap operas have gone before, but the cast assembled here gives their all, working to make somewhat odd characters into feeling people, and it’s enjoyable to watch these interpretations come to life. Read the rest at Blu-ray.com