Spafford closed out a run in Colorado this weekend, and the band marked their Friday night show at the Aggie Theater in Fort Collins with a special guest appearance from Greensky Bluegrass guitarist and vocalist Dave Bruzza.

As JamBase reports, Bruzza came out for RHCP’s “Soul to Squeeze,” helping the Spafford deliver a bluegrass-infused version of the tune. Watch a video of the collaboration above.

Last night, the band wrapped up their run in the state with a three-set affair at Globe Hall in Denver, playing an all-acoustic first set, which featured a couple debut originals and a guest spot from the group’s old friend Don Cheek. The show continued with a second-set jam in which the band’s poster artist Jon Rose and touring crew took to the stage first and were replaced on-by-one by the band members without a break in the music. The night later ended with an encore performance of J.J. Cale’s “After Midnight.”

See the full setlists below. Next up for Spafford is a stop at the Crocodile Cafe in Seattle on November 14.

Aggie Theater, Fort Collins, CO

Set I: It’s A Bunch > Mind’s Unchained, You Don’t Know How It Feels, Slip And Squander, Windmill, All In

Set II: Virtual Bean Dip > Backdoor Funk, Electric Taco Stand, Soul To Squeeze*, America, The Reprise

Enc: Shake You Loose, Galisteo Way

Notes: *w/ Dave Bruzza

Globe Hall, Denver, CO

Set I: Stuck In The Middle With You, Leave The Light On, Hollywood, Jordan’s Untitled Song*, The Evil Solo*, Simon & Lily, Mad World, The Remedy^

Set I:* Jam^

Set III: Seven > Walls, Dream Jam > Todd’s Tots, Levilan Shores

Enc: After Midnight

Notes: *debut
^w/ Don Cheek
+w/ Jon Rose, Spafford crew