I own a few 867-5309 numbers for different areas. I have them do nothing these days but for a while I let them hit a pbx and we’d get up to 2500 calls a day on each line. Lots of drunk dudes trying to call Jenny.
I think you should utilize a similar technology for your phone numbers.
Been listening to RBCP (The guy who does Snow Plow Show and Phone Losers of America) for a long time now. Great to throw on in the background for some laughs at the end of the day while reading.
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.