They seemed created for the Italian restaurant, unless the Italian restaurant had been perchance created for them.

But that last hypothesis was unthinkable, since one could not place them anywhere outside those special establishments.

One never met these enigmatical persons elsewhere.

It was impossible to form a precise idea what occupations they followed by day and where they went to bed at night.
And he himself had become unplaced.

It would have been impossible for anybody to guess his occupation.