For those who prefer roots music to jazz or classical, Bay Street Theatre in Sag Harbor is presenting “Way Out East . . . a Journey in Song” on Saturday at 8 p.m. Nancy Atlas, Caroline Doctorow, and Inda Eaton will collaborate to perform original works from their respective repertoires, including new music and special guests. Tickets, which are $25 in advance, $35 the day of the event, are available at the box office or baystreet.org.