If you haven’t gotten your flu shot yet, there’s another opportunity this weekend. On Sunday, from 10 a.m. to 4 p.m. free flu shots are being offered in the community room of the Vladeck Houses, 328 Madison Street. The program is sponsored by Assembly Speaker Sheldon Silver in partnership with Gouverneur Healthcare Services. Keep in mind: the supply is limited and shots are available on a “first come/first served” basis. For more information, call the Speaker’s office at 212-312-1420.