Butler Little Theatre will host an improv night featuring unscripted randomness and including audience participation, at 7 p.m. Saturday at the theater at One Howard St. Admission is $5 at the door. BLT’s youth production will be “Charlie and the Chocolate Factory,” by Roald Dahl and adapted by Richard George, at 7:30 p.m. July 14 to 16 and at 2:30 p.m. July 17.Executive producer is Connie Donovan, and student director is Shannon Donovan.Visit bltgroup.org.