Gary P. Nunn

Lost Austin Band at the Roost. This gathering of key players from the Cosmic Cowboy heyday could serve as a nostalgia trip for those who were there, or as a historical primer for more recent arrivals who are curious about the era that began putting Austin on the map as an Americana mecca. National attention peaked with Willie and Waylon and the Outlaw phase of the mid-’70s, but the key players in this ensemble — Gary P. Nunn, Bob Livingston and Craig Hillis — were integral to the fruitful early-’70s period that immediately preceded it, through their work with Jerry Jeff Walker’s Lost Gonzo Band, Michael Murphey (before he added the Martin) and more. Bill Browder and David Moerbe of the country-rock band Denim also are aboard, as is Ernie Gammage, whose roots trace back even further to 1960s Austin pop group the Sweetarts. Their repertoire will survey many of the best-known songs of that era. $20-$50. 7 p.m. doors. 2113 Wells Branch Parkway. theroostaustin.com.

Also: Singer-songwriter Sam Baker wraps up a month of 6 p.m. Sunday shows at Strange Brew, with a quality chaser from Warren Hood & the Brewbirds at 8 p.m. … Always dependable on Sundays at the Saxon Pub are the Resentments.