How do you find a girl for a threesome on the internet?

Hey there. My boyfriend and I are going out of town next week and want to have a threesome with a random girl in the city we’re visiting. Only requirement is that she’s hot. We started looking for one online 2 weeks ago because we figured it might be difficult, but it’s been even harder than we’d imagined. We’re young and attractive, so we’d be perfect for any girl that is looking for a threesome, but we just don’t know how to find one. Everyone on craigslist is either fake or has some sort of insane insecurity issue. We’re considering adultfriendfinder, but you have to pay for it, which isn’t a problem for us other than the possibility of feeling like dbags if we paid for it and still weren’t successful…and we’re just not sure how reliable adultfriendfinder would be. Any suggestions? Thanksss!