Verizon once sent me a price list of their various services, much of which were legacy. It appears that most legacy services are still available if one is willing to pay for them. Sometimes switching to modern technology might be cheaper. (Some exceptions--in my state party lines are no longer available, and I believe they discontinued
20 ma and 60 ma lines that served old style Teletypes).Regarding the theatre and its phone booth, I can't think of any reason why the phoneco would not continue to provide that service. However, I suspect the pay phone doesn't get much use and the theatre owner must pay for it to make up the shortfall. It might be cheaper for them to terminate the pay phone and just have a regular line for the box office.
Regarding the issue of message rate service to businesses, I checked the Bell Labs history 1925-1975. It appears message rate was used in large cities while smaller cities had flat rate. On the technology of recording charges, I was confused. On the one hand automatic counting- registers for developed very early for manual service and adopted for switches when dial came out. (In a few large cities that had message unit service (eg New York), the registers would increment for initial charge and timing; in 1950 this was expanded to dialed suburban calls.) But their other descriptions of message charging required complex equipment, such as for ANI.