This is a really cool idea. Essentially for a $5 roundtrip fee, you can choose the person who sits next to you froma group of people that match your selection criteria. The company website is another story. To me it looks like some kind of creepy dating service/escort site.
Personally I would pay $5 to make sure that I sit next to someone who won't bother me. I don't know about finding "a date in Los Angeles". But there is a market of some kind here I think.