Think it would be best to stick to era's rather than genres, as thankfully, there's a lot of variation in the era's.
60's: Guitar pop, blues r&b, motown, psychedelia, ska / reggae etc.
70's: Funk, Prog, R&B, Punk, Post Punk, NWOBHM, Disco, Two Tone Ska, Reggae, etc.
80's: New Wave / New Romantics, Synth Pop, Rock, Metal, etc.
90's: Indie/Brit Pop/Shoe Gaze, Madchester stylee dance, Rock, Metal, etc.