I got some numbers for non-Store worlds, just as a start.
Notes on this data: I included only resident men, any age from toddler to elder. The younger ones will grow up, and the older ones can be reserved for earlier use.
And for all I know, I miscounted.
Sunset Valley: 29 men to 36 women
Twinbrook: 32 men to 31 women
Bridgeport: 31 men to 34 women
Appaloosa Plains: 19 men to 18 women
Starlight Shores: 34 men to 31 women
Moonlight Falls: 26 men to 32 women
Isla Paradiso: 25 men to 25 women
So if you want an abundance of men, make your sim pack her bags for Starlight Shores, or perhaps Twinbrook, and say hello to some unique genes wherever she lands.
But Sherry raises a good point. A lot of it boils down to what genes you like to see.