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According to the Interweb, that unimpeachable source of truth, some of the warning signs that a spouse is cheating – along the usual behavioral indications – include a variety of changes in consumption habits: buying a gym membership to get in shape; scoring new clothes; taking out new credit cards in their name only; and a sudden fondness for mani-pedis.

Marketers of those products and services take note: You may want to step up your efforts in the following 10 cities, which are, according to AshleyMadison.com, the mistress capitals of the U.S.:

  1. Phoenix: 38.4%
  2. Washington, D.C.: 34.7%
  3. Dallas: 31.9%
  4. Las Vegas: 28.5%
  5. Los Angeles: 25.7%
  6. Houston: 25.1%
  7. Honolulu: 24.3%
  8. Charlotte, S.C.: 22.2%
  9. Ft. Lauderdale, Fla.: 20.4%
  10. Denver: 18.1%

Per Andrea Domanick’s article in the Las Vegas Sun, Las Vegas made its debut on the list this year among cities with the highest percentage of single female AshleyMadison members having affairs with married men (doesn’t logic dictate that it would be near the top every year?). The controversial dating site’s marketing research of its clientele found that more than one-fourth of Las Vegas women using AshleyMadison.com to seek out affairs with attached men are single.

As Domanick notes, site founder Noel Biderman says those stats aren’t surprising. “The number of single women seeking married men in Las Vegas goes to show the phrase ‘What happens in Vegas stays in Vegas’ also extends to permanent residents seeking no-strings-attached relationships,” he said in a statement.