The Great Gatsby, a hint of bedrooms

Could you please tell me the meanin of "hint" in the following passage from the chapter 8 of The Great Gatsby?

It amazed him—he had never been in such a beautiful house before. But what gave it an air of breathless intensity was that Daisy lived there—it was as casual a thing to her as his tent out at camp was to him. There was a ripe mystery about it, a hint of bedrooms upstairs more beautiful and cool than other bedrooms, of gay and radiant activities taking place through its corridors and of romances that were not musty and laid away already in lavender but fresh and breathing and redolent of this year’s shining motor cars and of dances whose flowers were scarcely withered.

Thank you.