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Top 10 most promiscuous cities in the U.S.

By Ysolt Usigan

December 6, 2011 / 7:16 AM EST / CBS News

Top 10 most promiscuous cities in the U.S. — istockphoto

According to dating site OkCupid, these are the cities where the highest percentage of "casual sex seekers" can be found (in case you're interested)...

Houston, the fourth largest city in the U.S., landed the number-10 spot in this countdown.

9. San Diego, Calif.

Also on the the list for the Farmer's Almanac's top 10 cities with the best climate, San Diego is the ninth city on the list of "loose."

8. Denver, Colo.

Denver, the most populous city in Colorado, has the 8th most promiscuous daters, according to OkCupid.

7. San Bernadino, Calif.

Congratulations to San Bernadino, also referred to as the Inland Empire, for landing the seventh spot on this list.

6. Dallas, Texas

Home to the third largest concentration of Fortune 500 companies in the nation, Dallas is number six.

5. San Francisco, Calif.

Known for its chilly summer fog, steep rolling hills, eclectic mix of Victorian and modern architecture, San Francisco is also the fifth most promiscuous city.

4. Miami, Fla.

Although Forbes magazine ranked Miami "America's Cleanest City" in 2008, it's number four on our list of naughty.

3. Pittsburgh, Pa.

Known for its steel industry, Pittsburgh can now also add "third most promiscuous city" to its roster.

2. Seattle, Wash.

The birthplace of grunge rock Seattle is also a breeding ground of casual sex, says OkCupid. It's number two on our list.

1. Portland, Ore.

Ow, Portland! You're not only known for being the most eco-conscious, you're also the most promiscuous city, according to OkCupid.

Ysolt Usigan

Ysolt Usigan is the editor of lifestyle and technology for women at CBSNews.com