Although it's probably a little uncouth to listen to other's conversations in restrooms, especially in the stalls (ESPECIALLY IN THE MEN'S ROOM!)...I once got a client because a guy next to me in the stall was complaining to his wife that they hadn't planned their summer vacation yet and he thought that the airfare would be too much money.  After we both got done with "business", and were done washing our hands - important - I introduced myself and told him I could help him save money on airfare and get him the vacation they wanted.  He took me up on my offer, and we had his trip booked the next week!