Here's an example from Tyson's Corner, VA, which you might know as the home of the world's first Apple store:

http://www.fairfaxcounty.gov/dpz/zoningordinance/articles/ar...

Example quote (in the context of commercial shopping centers and parking minimums that apply):

> 1,000,000 square feet of gross floor area or more: Four (4) spaces per 1000 square feet of gross floor area

EDIT: Note also that you get absurd scenarios like pools requiring a space per 4 people that can use the pool, or vets having to have at least 10 spaces, and so on and so forth. Absurd regulations