A gathering like this can mean only one thing: The Princeton Triangle Club is ready to go on tour. This year’s show, “Tree’s Company, Forest’s a Crowd,” promises “a rollicking trip into the woods.” ­Performances are scheduled Jan. 27 in New York, Jan. 29 in Cincinnati, Jan. 30 in St. Louis, Jan. 31 in Nashville, and Feb. 2 in Washington, D.C., with encore shows during Reunions May 31 and June 1. For details, visit