If I was less scrupulous, I can think of a few ways to easily monetize that. The first and simplest is to have a toll line that charges on call and have a recording on the 867-5309 numbers that refers them to call it.
Whether you go the sultry "really meet Jenny" angle or just try to find something that piques the interest of the average drunk male that would call, just to see what they're being referred to, you'd probably get enough takers to turn a tidy profit regardless of how crappy the ultimate toll line was. I doubt it takes all that much to convince callers that are already drunk and trying to do something they think is mildly funny already.
Whether you go the sultry "really meet Jenny" angle or just try to find something that piques the interest of the average drunk male that would call, just to see what they're being referred to, you'd probably get enough takers to turn a tidy profit regardless of how crappy the ultimate toll line was. I doubt it takes all that much to convince callers that are already drunk and trying to do something they think is mildly funny already.