Bring on autumn and pull out the lederhosen! One of Chicago’s most popular celebrations of fall and all things Bavarian — Oktoberfest Chicago at St. Alphonsus presented by Paulaner — returns for its 18th year of seasonal revelry. It takes place both in and outside the iconic church located in Chicago’s West Lakeview neighborhood. Among the weekend excitement is Friday– and Saturday’s popular craft beer tasting nights in the parish’s German Beer Hall. Another highlight (in addition to beer, brats,…