That would have been a more correct statement.
"They are Republicans and do have country club memberships, but the GOP has changed quite a bit since 1960."
Again there is a one sided slant here. What were Democrats in the 1960's? were they Champions of racial equality? One of our present Democrat Senators from the state of West Virginai was the Grand whatever of the K.K.K. back then.
This Mad Men show's writers are showing their political bias and making a political statement. I'll bet that most country clubs of the 1960's in New York had both Democrats and Republicans as their membership and both acted in the same manner. The fact that they depict one side give an incorrect impression of the enviroment of the times.
We are talking accepted common practise here. There were Black and White Water fountains in New York, city and Boston in those days the same as there were in Birmingham, Alabama. And in the same manner as slavery was the common accepted practise and accompaning racial attitudes in the 1860.
Lets not forget that Robert E. Lee's daughter was ticketed and paid a fine of $5 in Cincinnati, Ohio for riding the tram in the "Colored Folks" section and refusing to move to the "White Folks" section. A reverse Rosa Parks protest.
Brown vs the Board of Education was in Kansas City schools and not Jackson, Mississippi.
And the 1957 Little Rock School desegration crisis was because of an Eisenhower adminstration (republican) Justice Department opinion that set those events into motion and Eiserhowere was the one who sent the troops to Little Rock (in violation of Constitutional restraints).
But in all fairness it was also a Republican (U.S. Grant) who failed to sign the 1872 Civil Rights act that had been passed by Congress to give the ex-slaves equal rights at that time. So don't let your preception of history be formed by T.V. and Movie script writters.