in chap. 11,
John watched a movie at the feely.
in the movie, a negro and blonde female have a love affair in a helicopter for 3 weeks.
then, 1. why is it anti-social?
and 2. what is the meaning of 'tete-a-tete'?
Tete-a-tete here likewise has sexual overtones - indicating as it does a private conversation, the context indicates that the couple are doing more than just talking! This film is anti-social as it depicts a lasting monogamous relationship, which was discouraged by the society of this novel.
The term tete-a-tete does mean head-to-head, but it denotes a private conversation in both French and in English (usually one has one's head close to the others when engaged in such a conversation). As post #2 suggests, it is used euphemistically here. Another definition from The American College Dictionary supports this euphemistic definition: a tete-a-tete is a sofa that is arranged so that two people can converse together. Still another defines it as an adverb meaning of two persons in private. For example, to sit tete-a-tete.
This last one may be the one most appropriate as the blonde is "ravished" away and engaged in a "wildly anti-social tete-a-tete with the black madman.
Tete a tete means "head to head" in French. It means a meeting or a time together when you are face to face with someone. It is being used slightly euphemistically here.
This is antisocial because people are not supposed to have lasting relationships with one another. They are supposed to have sex with different people every night, more or less. So being together for 3 weeks and not having anyone else is antisocial -- it goes against the accepted behaviors in their society.