People generally hang out with other people of their general socioeconomic class, so it doesn’t take much guesswork. Usually, they just have nothing in common with poorer people (not the literal poors, upper middle class is poor to them), don’t go to the same places that poorer people go to, and unfortunately, poorer people generally tend to be less attractive than rich people due to lack of access to cosmetic care. The cosmetic care includes skincare, dental work, and I’ve even seen growth hormones as soon as elementary school.

One last point, multimillionaire and billionaire circles are extremely small because, as you can imagine, there’s not that many of them! They tend to know way too much about each other, so if you do happen to be poorer and run in their circles, they’ll either know and/or you’re smart enough to be playing their game.