For POST-BEGINNER GUITARISTS who know basic chord changes, can play a few songs, and want to train their ear and understand the nuts and bolts of music better. If you're a beginning guitarist who's just starting out, please consider joining the Southbay Acoustic Musicians, who offer great beginner classes that prepare you for the Del Rey Acoustic's next level of instruction. Meetups will provide instruction on ear training, scales, chord progressions, recognizing song structure, etc., without ge …