1972-6 must have been quite a busy time for 33. In addition to TPIR, Match Game, Now You See It, Carol Burnett and All in the Family, I would imagine that Maude, Good Times and One Day at a Time were taped there as well (not sure about Sonny and Cher and Cher's solo show). The Norman Lear sitcoms moved over to Metromedia Square during the 1975-76 season.
I attended a taping of Spin-Off (starring Jim Lange) in June 1975 on the second/upper level of Television City (studio 41, maybe?). I was only 11, so was too young for TPIR (I was crushed) and could only attend either Spin-Off (which hadn't premiered) and Gambit. What was I thinking? Anyway, while in line we met a woman who had recently won a car TPIR, which was equivalent to rock stardom to me at the time.
It would be interesting to see taping schedules for the whole complex from that era. It seemed like every other CBS show was coming from Television City in the mid-70's