The acoustics at San Francisco’s Grace Cathedral are superb. Constructed in 1928, Grace, the nation’s largest Episcopalian cathedral, was was finished only in 1964. Flags of many countries adorn the ceiling, and some of its gold-leaf paintings, when viewed from a distance, would not be out of place in a Buddhist temple. Solo jazz concerts at Grace are something of a tradition. Mavis Staples has performed here, and duos such as saxophonist Harold Lloyd with tabla percussionist Zakir Hussai