The Oscillators (l-r): Glen Oliff, John Lee, Charles Ostle, and Matt Rippetoe Charles Ostle is becoming one of the more sought after drummers in D.C.’s jazz scene, especially amongst the crop of younger players that have emerged over the past few years. In addition to performing with groups such as Inner Loop, Motel, and others, Ostle also chose to start his own band, a relatively rare step for a drummer to take. His group,…