SUMMIT -- Vivid Stage, in residence at Oakes Center at 120 Morris Avenue in Summit, is enrolling its late spring session of improv classes for adults. This session runs May 4 through June 29, 2026. Classes offered this session include the Joy of Improv introductory class, the advanced Scene Essentials and the Improv Production Lab. The Open Improv Jam for all levels is on April 29 .