I have, but most of those experiences were confined to Phish tour and the Hunter/Bukowski types, and the ones that didn't involved jumping into the dating (and/or engagement) pools headfirst to experience heartbreak intentionally...the idea being you can't write what you don't know
I find that--most of the time--experience leads to inspiration after it germinates for a while; inspiration that calls for a new experience in order to be written typically isn't ready to be written. This rule certainly isn't hard and fast.
Since metaphor, vizualization and imagery are so important in writing, I find it more crucial to find the interconnections between and from the place you are writing and the piece itself--the more indirect, the better--looping through all the other possible ideas and images that can incorporate themselves into your piece. (Again, since I view writing as a holistic process, in a way the piece writes itself and will let you know when something really *doesn't* work in the context into which you are attempting to make it fit.
All this having been said, seeking a specific experience for the stated purpose of writing about it is perfectly valid, especially in simpler cases (a la going for a drive to inspire or solidify a piece about driving) with little or no impact on personal life afterward (obviously, getting arrested, etc, in order to write about it has slightly more impact)...but you will very likely find yourself, later, using the specific-experience in a larger context in which it was never intended for use...