The classroom that Blanche is in, when taking her course, is the same one used in the episode "Yes, We Have No Havannas". I think, but an not sure, it was also used in the episode where Dorothy took the final showdown for Jeopardy. Blanche is the only one who is in that classroom for the first tme showing it, Dorothy is in that classroom twice, Sophia and Rose are in that same classroom only one time. It is unique to use the same set more than once during a whole show's run. And there are more that are reused.
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