The Rockterscale Measures Your Party's Awesome Quotient
Using two pressure sensing mats, a webcam that senses overall movement, and the Hat of Rock which measures the wearer’s degree of head banging, the Rockterscale can tell you to exactly what degree your party is rocking. Using a precision, wall-mounted, guitar-shaped gauge, the Rockterscale then displays the amount of rocking to the party itself, encouraging the partygoers to either step it up or cool it out.
That's pretty cool, but there are those who would argue that attaching that amount of gadgetry to your party automatically makes it not rock. For those parties, maybe you should eschew the Rockterscale, and measure the amount of rocking using the fire equalizer.