If you squint, you can see the expected pinpricks of density in cities like Seattle and Denver. But Alaska?! I would guess that in those regions workers just live very close to their jobs. More research is required.
Unsurprisingly, people with higher incomes are more commonly found in your standard large American cities, particularly in a big stripe along the northeastern megalopolis.
The midwest seems to be a hardworking region, along with Alaska. Contrast this map with the high income map above for an interesting hypothesis regarding the dependence of income on hours worked.
If you want to live around hardworking bowlers, move to the midwest, my friend.