SEEN ON THE SCENE: Music and entertainment mogul Sean “Diddy” Combs was seen at Joe’s Stone Crab on Grand Thursday afternoon — while in town for DeLeon Tequila’s Nights tour, spied luncheon on Chilean sea bass with a posse of pals. … Pro Football Hall of Famer and lifelong Chicagoan Marv Levy — 91-years-young — will be honored by the city of Chicago Tuesday with a ceremony dedicating “Honorary Marv Levy Way” on the block in front of his Lake View home. As NFL sports fans know, Marv still holds the record for the winningest coach in Buffalo Bills history. … Foodie alert! TV chef star Robert Irvine did a fan meet ‘n greet at Studio Xfinity in Lincoln Park Wednesday. … Pulitzer Prize and Tony Award winner Tracy Letts will be at the Music Box Theatre on Southport Friday night (after the 7 p.m. showing of his new film “Christine”) to do a Q&A with the audience about the new movie. … Let’s call it a “9021-NO” reunion for Jennie Garth, when she dined at River North’s Public House, along with her husband, David Abrams the other night. The actress was recognized by many fans — who she graciously greeted and posed for selfies. … Nick Gehlfuss, who appears on “Chicago Med,” “Chicago PD,” and “Chicago Fire” was seen breakfasting at LYFE Kitchen in Streeterville. … Speaking of “Chicago Fire,” that show’s “Stella Kidd” — Miranda Rae Mayo — was the star attraction at the annual Seneca Park tree lighting event Thursday night in Streeterville — appropriately held in the Engine #98 firehouse on Chicago Avenue —adjacent to the park and the Eli Schulman Playlot. … Art lovers and actors Shia LaBeouf and John Cusack (separately) have checked out the Diana Thater exhibition at the Museum of Contemporary Art. … AJ McLean of the Backstreet Boys was seen hanging out with a group of friends on Joy District’s rooftop the other night.