Pickup his food vice (pizza? wings? subs?), and throw an impromptu team birthday party in his honor.  You probably know his food vices better than us, but we listed a couple ideas below by city to get the idea generation flowing!

New York: Joe's Pizza, Bleecker Street Pizza, Artichoke Pizza

California: In-n-out

All Locations: Chick -Fil-A, Shake Shack