The sex and adult entertainment industries are expecting a boom in business when an estimated 35,000 visitors descend on the Mile High City for the presidential nominating bash… But outside the event, the choices available to the delegates, journalists and others are unlimited, giving new meaning to the term “conventional sex.” More than six months before the convention comes to Denver, the offerings already online range from Claudia the “she- male porn star” to Erin the “adorable college cutie,” whose $300- an-hour services are guaranteed to “leave you breathless.”