It’s a one-night-only experiment featuring the Spokane Symphony and Terrain. And for its second year, Uncharted!, which melds classical music with local bands and artists and dancers, is at the Martin Woldson Theater at the Fox, giving the evening an air of artistic classiness. Participants include local musicians Von the Baptist, Mama Doll and Liz Rognes, along with artists and writers like Ellen Welker, Tobias Hendrickson, Alan Chatham, Simeon Mills and Jon Deviny and dancer Vincas Greene. The Spokane Symphony’s Eckart Preu conducts. Be sure to arrive on time, as activities begin as soon as the doors open.