As much as we love the prevailing American Idol singing style, whereby performers attempt to hit eight or 10 notes where only one is needed — and we really do love it, especially when the singer points to each note as it's sung — there was an era, fondly remembered by parents and grandparents, in which pop singers weren't so obnoxious. Obviously, that era was the 1960s, during which psychedelia, freedom and hi-fi stereos reigned supreme. The Barn Players celebrate the decade with SHOUT!, a loose musical comedy that justifies awesome arrangements of such hits as "To Sir With Love," "Downtown," "You Don't Have to Say You Love Me," "Son of a Preacher Man," and others. Catch tonight's performance at 7:30 at the Barn Players Theatre (6219 Martway, Mission, 913-432-9100). Tickets are $15 ($12 for seniors, $7 for students with ID). For more information, see thebarnplayers.org.