Members of the band include Republican state Reps. Mike Tryon of Crystal Lake, Chad Hays of Catlin and Democrat Sen. Don Harmon of Oak Park.
For the Inauguration event, they will be joined by Rep. Hays' sister, Carla Modglin, a singer and keyboardist from Muskego, WI as well as Tom Grassman (lead guitar), Jeff Markland (drums) and Michael "Guido" Esteves (bass), all of Champaign-Urbana.
The Boat Drink Caucus combines Jimmy Buffett-like tropical style with classic rock favorites.
Read more about the Boat Drink Caucus:
Tom Kacich: Hays' band to open Rauner's inauguration
Illinois state Rep. Mike Tryon’s band to play inauguration concert