Stan is the person who played the Circle of the Gurgles. He was seen in Charlie is 2!. Teddy and PJ were delivering chicken, so they could get free tickets. That didn't work, so PJ secretly stayed and tortured him with his songs. Stan soon decided to call security to arrest him. Later he sold the songs and bailed PJ out for credit. Stan is portrayed by Christopher Darga.
Stan is supposedly very inpatient as seen in Charlie is 2! when he got annoyed with the remote. He also wears his circle outfit all the time. Stan graduated from Yale.
Proof of him going to Yale:
In episode Charlie is 2! he walks into his apartment and said:
"I can't believe I went to Yale, and now I'm a Gurgle."