The Chicago Loop Alliance brings back its popular popup art series Activate for the fourth year. The annual event turns downtown alleyways into vibrant exhibition spaces. This year’s theme, “Off Street” delves into the “alleyness of alleys,” exploring each event’s unique setting. The kickoff will be held June 15 from 5 pm-10 pm at the Sullivan Center alley, on Monroe St. between Wabash and State and will feature an interactive black-light mural and projection mapping, body-painted professional ping pong players ready to challenge the crowd and a pop-up barbershop from Joe’s Hair Studio. More Activate popups are scheduled for July 20, August 24 and September 28, locations TBA. Visit loopchicago.com for more details.