Father-and-son Brian Dewhurst and Nicky Dewhurst attend rehearsal for the fifth-annual “One Night for One Drop” at Zumanity Theater at New York-New York on Tuesday, Feb. 7, 2017, in Las Vegas. …

Father-and-son Brian Dewhurst and Nicky Dewhurst attend rehearsal for the fifth-annual “One Night for One Drop” at Zumanity Theater at New York-New York on Tuesday, Feb. 7, 2017, in Las Vegas. (TVT)