It depends upon what the client wants. Over 80% of my reception clients books the following lightshow:
4-Roboscan 812 intel scanners
4-Robocolor-II intel colorchangers
2-Robozap intel barrels
1-Magic Moon effect (centerpiece)
4-ADJ Opti-Par 575w halogen compact par cans
2-ADJ Agressors
2-ADJ Jewel II's
2-ADJ Sparkles
1-non ADJ Green laser
2-ADJ Black Widows
4-pin spots overhead for punch effect
2-pin spots dedicated for mirrorball (812's also paint the mirrorball)
1-ADJ large red beacon
1-8" mirrorball w/1rpm motor
1-3032 light controller (IBM PC)
2-ADJ SF-8C 8ch controllers
1-ADJ CC-2016 chaser
2-Crank stands (12')
1-10'X 14" triangular truss
1-MP-1000 fogger (MP-2000 for REALLY large venues)
Bob