WeightWatchers will meet at 5:30 p.m. at 101 School St. The Waltham Public Library will hold an English conversation group at 10 a.m. Stay up to date with Waltham news with our free, daily newsletter. A senior center art class will be held at 9:30 a.m. in at the Senior Center in Watertown. Have a question about something happening in Waltham? Want to know what new business is going into a site? Let us know what is on your mind and we'll see if we can dig up the answers in our "You ask, Patch answers" posts. Email questions to editor Ryan Grannan-Doll at email@example.com.