Dallas, long known as a Baptist stronghold and home of Stetson-wearing business types, is touting a new image: gay travel destination. The city has joined other locations, such as Philadelphia and Fort Lauderdale, in actively reaching out to gay, lesbian, bisexual and transgender visitors. "Our secret is out," says a page at www.dallascvb.com, the city's official tourism Web site. The page lists venues of special appeal to gay travelers, including Oak Lawn, a neighborhood with a predominantly gay population, bars, museums and more than 20 gay-friendly hotels.