Name: BarryNet Message Board Date/Time: 4/16/2021 2:37 AM Subject: 40 Years Ago Today (April 16, 1981): Riviera Hotel in Las Vegas! This Day in MANILOW History - April 16th: Barry Manilow opened a one-week concert engagement at the Riviera Hotel in Las Vegas, Nevada, FORTY Years Ago TODAY (April 16, 1981)!