If you’re still trying to figure out how to make the most of Winter Restaurant Week, which is scheduled from Sunday, March 4th through Friday, March 9th, keep in mind: restaurant like Chiara, Grotto, Lumière and UpStairs on the Square will all be extending their participation and Somerville favorite, EVOO, continues its off-the-record participation this year. Check out the Unofficial Guide to Restaurant Week for more information or call the restaurants directly for details.