I was a regular at the 13th Avenue Gallery (it was originally on 13th Avenue in theSellwood district of Portland) in 1959-61. Mike and Ron were regular performers.   Ron Brentano went on to work for many years for the Oregon Historical Society, which a few years back put out a CD of his work. Another regular performer at the Gallery was Mel Lyman (years before his subsequent career as a harmonica player and guru). Paul Hebb also sold me my first copy of the Little Red Song Book (13th edition). Great times, and I still pick up a banjo now and then.