Dorchester Open Studios will be held this weekend, Oct. 22-23, from 11a.m. to 5 p.m. at two locations: Humphreys Street Studios and Dorchester Art Project in Fields Corner. Organizers say they expect 45-plus artists at the Humphreys Street Studios. “The hope is that this is a build-back year for Dorchester Open Studios,” said HSS artist Cristina Todesco. “Moving forward, we