Sen. Colleen Lachowicz, of Waterville, will hold public office hours Saturday in Pittsfield and Waterville. The first session is set for 9-11 a.m. at Vittles Restaurant, in Pittsfield, the second session is set for 2-4 p.m. at Jorgensen’s Café, in Waterville. Sen. Lachowicz will hold office hours the first weekend of every month.