The demographics for the place like the Plaza are simple: working professionals with a bit more disposable income. Just running the numbers, a combined (or single) household would have to be making around $200K and up to get into one of these places. They could be doctors, dentists, lawyers at big law firms, people in the financial field, investment bankers or business people (no need to argue with me that Kaiser doctors don't make that much or not all lawyers do - I don't know, I'm just saying). There are some technology companies in the area as well, and I'm sure they have their share of high salaried employees - maybe not as high as $200K, but a young couple with a combined income of that level could swing it. I also mentioned international business people - for some reason those people seem to have a lot of money, and with the weakness of the dollar, property here may be more affordable than in their own countries.