Complex sentence: They played at places like The Ash Grove which was one of Los Angeles's most popular folk clubs and it became a favorite haunt of theirs and brought them into contact with Hoyt Axton, Ramblin' Jack Elliott, Reverend Gary Davis, and Barbara Dane.
Split into simpler sentences: They played at places like The Ash Grove, one of Los Angeles's most popular folk clubs. It became a favorite haunt of theirs and brought them into contact with Hoyt Axton, Ramblin' Jack Elliott, Reverend Gary Davis, and Barbara Dane.