Best actress Jennifer Lawrence, who’s in town to shoot the new David O. Russell movie, dined with friends at Trattoria il Panino in the North End on Friday night. Meanwhile, Jeremy Renner, who’s also in town for the movie, was seen at Scampo, and Christian Bale, who plays Lawrence’s husband in the film, was seen traveling through the city with his family on scooters on Saturday. . . . Dan Aykroyd was also seen at Scampo celebrating his daughter’s birthday over the weekend. . . . Bret Michaels, who turned 50 last month, entertained a sold-out audience at the Malden nightclub Rain on Thursday.