Duos rule at Rock City Café, 316 Main St., with live presented Friday and Saturday, Aug. 19 and 20, from 7 to 9 p.m.

Happy Folk, performing Friday, comprises a rotating bandwagon of friends and family wrapped around the music and philosophy of Nik Hasenfus and Aria Zarnoski. The two songwriters attempt to dissolve the boundaries created by the performing arts, combining their ambitions of authentic relationships as well as similarly natural genres of music.

The current core duo is Portland-based these days, exploring a new musical identity with each new friend and each new day. Happy Folk plays old favorites and new original material; and won the solo/duo category of this year’s fifth annual Sound off Music Competition.

On Saturday, Rock City presents Sea For Miles, an experimental folk collaboration between songwriter Matt McInnis and producer Michael McInnis.

Food is available until closing. For more information on these and other events happening at the coffeebar/cafe, call 594-4123 or find it on Facebook.

Courier Publications’ A&E Editor Dagney C. Ernest can be reached at (207) 594-4401, ext. 115; or dernest@courierpublicationsllc.com.