Buy, Buy, Buy – Don’t worry about hoarding the money you make because you’re a starving musician. As soon as you can upgrade something in the club, do it. Every upgrade you buy, or character you hire, adds bonuses to your performances which increase your earnings with each show you put on.
Chain Your Power-ups – As you unlock more power-ups, you’ll find that you have to keep lesser ones in queue in order to access more powerful ones. If you let yourself wait until all of your active power-ups are charged before using them, you’ll find it will draw a much higher response from the audience.
These are just a few ideas to help you out. If you have other suggestions, post them below!