Star sightings include Jesse Spencer, Sophia Bush and Danni Allen

SEEN ON THE SCENE: Yup, that was Ed Swiderski of “The Bachelor” fame spied at Rockit Bar & Grill the other night. … Kudos to the organizers of the 20^th anniversary event for the U.S. Holocaust Memorial Museum — bringing together 2,500, including 50 Holocaust survivors, for a Sheraton-Chicago luncheon and raising a record-breaking $5.8 million to further the cause of “Never Again.” … Jesse Spencer (“Chicago Fire”) and Sophia Bush (“One Tree Hill”) were spotted at dining at the Wit Hotel. … Among the 40,000 runners in the Chicago Marathon was “The Biggest Loser” season 14 winner Danni Allen, competing in her first marathon with a very respectable time of 4:09 — achieving a goal she set after winning “Loser.” … Bears Julius Peppers, Cory Wooten and Cornelius Washington had fans heads turning at Mastro’s Monday night. … Speaking of football, through the NFL season Municipal Bar + Dining Company in River North will bring in a Bears player every week to host a “Monday Night Football” event — as Steve Maneri did this week. … Many models and other women who depend on their looks for their careers avoid revealing their age. But not model and actress Veronica Zepeda who proudly celebrated her 40^th with a huge fete at the Institute of Puerto Rican Arts & Culture, joined by friends and family, including her beau Bob Loquercio and politicos Jesse White and Alexi Giannoulias.