Star sightings around town: Janet Jackson, Sarah Michelle Gellar

SEEN ON THE SCENE: While in town on her tour, Janet Jackson and husband Wissam Al Mana were spied dining at Rockit Bar & Grill and Studio Paris. … Meanwhile, Jackson’s dancers continue to party on at the Underground — where the NBA’s Russell Westbrook was also sighted. … Jackson also had a lot of fun at the arcade bar and eatery For the Win — partying with her tour crew and dancers, playing arcade games and miniature golf, plus picking up chicken wings and corn dogs to go. … Reality TV queen Bethenny Frankel slipped into Sunda where she celebrated her birthday. … Recent Tavern on Rush sightings have included ESPN’s Michael Wilbon and the Bulls’ Pau Gasol, plus “The Real Housewives of Orange County’s” Vicki Gunvalson. … Pro athletes (both current and retired) continue to make a beeline to recently opened STK Chicago — including Jeremy Roenick, Isiah Thomas and Antoine Walker. … Roenick, by-the-by, also was seen at RPM Steak, as were Wilbon, the Hawks’ Niklas Hjalmarsson, Sarah Michelle Gellar and singer-songwriter Skylar Grey, who also checked out Ramen-san. … RPM Italian was the eatery of choice for Sox pitcher Carlos Rodon on Saturday night.