The Downtown Des Moines Chamber of Commerce will host its next event in the Restaurant Luncheon Series at Cafe di Scala, 644 18th St. The Sept. 30 luncheon will begin at noon and will focus on how the restaurant is evolving with a new restaurant concept called Aposto, unveiling in early 2016. The Restaurant Luncheon Series is designed to feature downtown restaurants and what makes them unique. Tickets are $20 for chamber members and $25 for nonmembers. Registration can be completed online.