Is it really being suggested that some new names need to be added to the long line of conspirators? Are managers at the TT now suspects because of the movies they chose to screen on that day?
If Oswald changed seats a few times, there might be testimony from those he sat beside... I don't know. But one can consider the possibility that Oswald --- who was an expert in spycraft after all, according to CT tall foreheads --- the smart move would be to proposition a stranger and go home with them, thus disappearing at least temporarily.
Remember the 1971 movie version of Frederick Forsyth's
Day of the Jackal, where the protagonist, played brilliantly by Edward Fox, while on the run, picks up a guy in a bathhouse, goes home with him... eventually murdering him and stealing his ID.