For real though? Genres are 90% bullshit. Era doesn’t matter at all. And, if you have to know what the track is about genre/era wise to be willing to give it a listen, you lose half the fun of things :)
Let the music stand on its own. Having the meaningless facets of the track before listening prevents a truly naive first listen, and that’s the best way to encounter new music.
Save the metadata stuff for after the listen, in the comments. That’s where the real discussion should be anyway.