Leah Osborne Duo with Sam Avery Friday, September 18 6PM-9PM Pay what you can \ $10 Suggested Leah Osborne is a prominent St. Louis-based musician, singer, songwriter, and chef who serves as the co-founder and frontwoman for the Americana/bluegrass band One Way Traffic Band. Within the band, she is known for her soulful vocals and for playing the baritone ukulele and washboard.