The housing advocates at Good Old Lower East Side will host a workshop next Wednesday on how to use the state Department of Housing and Community Renewal to one’s advantage in the fight against neglectful landlords. The talk will cover how to best to combat “harassment, rent overcharges, reduction of services” and other common tenant woes. A lawyer will be on hand to answer questions beginning at 7 p.m. at the Perseverance House at 535 East Fifth Street.