After a successful holiday season and just in time for spring break, the Chicago Office of Tourism and Culture’s Magnificent Mile InstaGreeter service returns with free, one-hour walks of North Michigan Avenue and surrounding areas led by knowledgeable locals beginning March 16. The walk-up service, offered by the Chicago Greeter program, will be available through April 21 on Fridays and Saturdays between 10 a.m. and 4 p.m., leaving from the Water Works Visitor Information Center, 163 E. Pearson Street. Volunteer greeters will provide information and insights on the Streeterville and Gold Coast neighborhoods; landmarks such as the John Hancock Center and the former Playboy Mansion, historic hotels and cathedrals; and best bets for shopping. For more information, visit www.chicagogreeter.com.