This may be a bit off-topic -
Last night, I went to see the Riverdance 25th Anniversary Tour. There is one scene where the background has a subway entrance, with the sign showing the B and E train symbols, saying DOWNTOWN/Brooklyn.
On the current route map, the only place where the B and E come together is along 53rd Street, where the E comes off of 8th Ave to head into Queens, and the B comes off of 6th Avenue to go up 8th Ave until it branches off after 145th Street to head into the Bronx. The only shared stop is at 7th Ave and 53rd Street. This station, though, is also served by the 6th Ave D train.
At the time of the original Riverdance, was there a station where only the B and E made stops? It has to be in Manhattan, due to the "Downtown and Brooklyn" signage (presumably, the other side of the street said Uptown, Queens and The Bronx). Or was this a case of the set designer knowing just enough to be dangerous?