The Duke Silver Trio
From the "Practice Date" episode (first aired 8 Oct. 2009) of sitcom Parks and Recreation.
Employees of the Pawnee, Indiana, Parks and Recreation Department are shocked to find their boss Ron Swanson (Nick Offerman) plays smooth jazz in local clubs under this moniker. They have two albums out (Smooth as Silver and Hi Ho, Duke), with a third on the way (Memories of Now).
- Looks like NBC forgot to renew the domain; here's a Wayback Machine archive of dukesilver.com.