OT: Does a recordingstudio necessarily need a lava lamp?

I remember (but cant find a link) Michael Wagner posted on gear slutzs a picture of a row of Lava lamps he keeps in his control room. Im not sure how it contributes to the sound but if hes using them it cant do any harm
 
I have one, it basically serves to keep band memebers who aren't being recorded busy. Most of the guys who come in will stare at it for like half an hour "Dude! it looks like grapes!"