The triple -threat talent of the charismatic performer Patti LuPone was on full display at the Kennedy Center Concert Hall on Friday evening---and, oh! What a night it was! A capacity crowd of what was obviously a devoted (and almost fanatical fan base) tuned out to see a glorious two hours of songs ---which were sung with sheer show -biz brio by the resonant mezzo-soprano of Ms. LuPone.