Space in Portland is holding a roots rock summit of sorts on Friday.

Headlining the triple bill of roots rock bands is the Molenes, a quartet working on its third album. Joining the Molenes are the Grassholes and the Coming Grass.

This is an 18-and-older show.

Tickets at Bull Moose Music stores and at www.space538.org.

When: 8 p.m. Friday

Where: Space, 538 Congress St., Portland

How much: $7