Proposal for non-offensive staged approval, - cheaper and much more effective than bringing actors or hiring a larger group and more tastful and natural than employing the infamous ’laugh now’ signs. : You have four friends in the audience, and place them at four ’control-stations’ of you own choice considerably apart from each other in the audience. When you want your cheers to erupt, after you give your secret sign to your ’little helpers’, each ’station’ performs its duty sequentially, like a basic computer program (1,2,3,4) after this model : 1st one catches the attention of the crowd with something ear-catching and even unpleasant occasionally, like a whistle or a gun shot, second one holds the attention in a grip, like a drumroll with colours psychologically (invent something) 3rd one laughs a high piercing laugh, 4rth one claps hands, stamps foot and/or whistles. This four step program will invoke the need for laughing in any audience. You should aim for diversity of expression, though, and not repeat the exact pattern, as it grows tedious, predictable, plus that repeated behaviour of the identical act will cast suspicion on your artistry as cheerleaders (for stage artists its the other way around) in a good place.