Growing acceptance of homosexuality is a big factor, says Gary Gates, the study’s author, but so is money. Gay and lesbian travel accounts for $55 billion of the U.S. market, according to a survey last year, and the bigger the community, the more gay tourists will flock. That’s why travel bureaus in cities like Dallas, Las Vegas and Tempe, Ariz., are pouring money into luring gay tourists. Cash, it seems, is one thing everyone can agree on.