By trial and error, I have found that the basic TV stands make the best stage. Depending on how big you want your stage will determine how may tables you will use. For my stage, I used 9 tables and laid them horizontally, as seen in the picture. Once those were placed, I put my musical instruments on the stage (I wish I didn't sell my amplifiers) and lights in front. If you notice in the picture, I have no lights in front of the Keyboard. When I placed lights there, the Sim could not get to it.
Now that your stage is set and ready to go, get up there and play with feeling!