the opening or "theme" scene welcomes the audience and sets the tone for the evening. it may also set the colour scheme for the show and will feature special effects and lighting. music may be original or a medley of current popular songs mixed with music from broadway or hollywood films; often the opening number is a potpourri of styles and performers may change costumes several times. between the production numbers, specialty "vaudeville/cabaret" acts are featured, such as jugglers, acrobats or magicians. at least one scene will feature water effects – another thing the lido is known for. the stage itself can be raised and lowered, may change back and forth into an ice rink or swimming pool, and can feature elaborate set pieces which come up from below. the closing number often features a number called "merci beaucoup" (featured in the television show "shirley maclaine at the lido de paris") and usually has some particularly spectacular costumes.