....is the term that economists might well use when describing either the collection of men looking for sexual contact with other men at a secluded area of your local public park or the men & women seeking each other on your local Craigslist. I see that on Investopedia it's defined as "A market where information is not quickly disclosed to all participants in it and where the matching of buyers and sellers isn't immediate."
I was discussing this with a friend today, using the example of the men sitting in their cars on the west aisle of the Boundary Road parking lot at Central Park. (It's the rainy season, so almost no-one is venturing onto the trails of the wooded areas).
Not only do they not seem to appreciate that no-one can see through the glare of their rolled up car windows. but there's really no mechanism to indicate what they're interested in. In my case, it's older uncircumcised otherwise straight men who are interested in getting sucked off. I'll admit that's a rather small sub-group, which is difficult to find....but perhaps that's why the "imperfect market" analysis springs to mind.
I suppose it could be addressed through the use of indicators, such as coloured decals placed disceetly on the right, middle or left of the car dash, but that begs the question of how such a code would be disseminated.