T. CHARLES ERICKSON/AMERICAN CONSERVATORY THEATEROBIE Awardâ  winning actor John Douglas Thompson stars in Terry Teachout’s look at Louis Armstrong,
T. CHARLES ERICKSON/AMERICAN CONSERVATORY THEATER OBIE Awardâ winning actor John Douglas Thompson stars in Terry Teachout's look at Louis Armstrong, "Satchmo at the Waldorf," playing at American Conservatory Theater through Feb. 7. ( T. Charles Erickson )