By day, they teach children, youths and people of all ages guitar, but by night, the faculty of the Old Town School of Folk Music jam out. They made an exception for WBEZ, and graced us with their presence this morning on ‘Eight Forty-Eight’ (our producer Joe was very apologetic about the early hour). You can also hear Steve Doyle, Jon Spiegel, Keith Baumann and Chris Walz this Sunday at 7 pm at the Myron R. Szold Music & Dance Hall at the Old Town School.