Having lived through the era of 1960s TV as a teenager, there was nothing more irritating than the Variety Show in which too-little music, lots of bad comedy and little-known "guest-stars" prevailed.
Along then came Shindig and Hullaballoo, devoted entirely to music with practically no chatter, where one musical guest segued seamlessly into the next, as you can see by watching these shows on Youtube.
Inspired by that format, amazing talents of the day, Petula Clark, the Mamas and Papas, the Supremes, Bobby Darin offered their "modern" take on the huge catalog of Rogers and Hart songs. There is no banter or chatter, no tired jokes or no-talents...just amazing performances by superstars of the day singing classic American songs known the world over.
This is a fantastic presentation that hopefully will be available on quality remastered DVD, as for now only poor-quality bootlegs are for purchase online.