If energetic young people spontaneously erupt into song and dance aboard a cruise ship or in a dormitory lobby, you have stumbled either into a special episode of "Glee" or some of the real-life antics of the Adrenaline Show Choir from Georgia Southern University. The onboard bit happened over Spring Break when more than half of the 40-member choir sailed with Carnival Cruise Lines to the Bahamas. Now that the whole choir is preparing for their big season capping Saturday, April 23 show at the GSU Performing Arts Center, the usual seven hours of practice per week don't seem to be enough.