Serge was the previous concierge of the Tipton Hotel. He only appears in the episode "The Prince & The Plunger".
Serge the Concierge is a liar; he lied about sending the flowers and poems to Carey Martin. He seems to show a dislike towards her children, Zack and Cody. He treats them like young children, and the boys do not like that about him. Serge was the concierge for the Tipton. The hotel engineer, Arwin Hochauser sent flowers and poems to Carey's doorstep, but when Zack, Cody and Maddie think it may be the new concierge who did it, Carey asks Serge out. Serge is then caught in a lie, but no one knows until the twins find out it is Arwin. On the date, Serge is called on his phone due to a customer problem. But there is no problem - Cody and Maddie pull a prank on him so Arwin can make his move. Eventually Carey finds out, Serge is dumped and the twins spill goat milk on his head. Additionally, he seems to be a fairly good worker, but due to the incident he was probably fired.