The easiest way I found to incorporate showcases is one of two ways. I usually start it an hour eariler from regular karaoke in order to still have a full show and night. You can either feature one singer doing an hour, or three singers doing 3-4 songs each, before starting your regular show. You may want to make them a flyer so they can give it to their friends, and if you have a web page for your show, set up a "Showcase Section" on it. Tell the singers that this is their night to shine and to invite as many friends as they like. By holding the showcase before the regular karaoke, it helps establish a crowd for the rest of the night. Hope this helps, or e mail me if you need more info.....MV
