I get what you're going for, but this simply isn't comparable. I pretty much can't walk into the same store and purchase the same item but be quoted a different price than anyone else.
There are rich areas and poor areas, touristy areas and off-the-beaten-path areas. But in US retail you won't find sellers discriminate based solely on the look of the customer in 99% of cases.
When I was in the USA a few years ago with an hispanic looking friend, he was often offered a steep discount at the various shops and restaurants. Often enough that we would ask him to do all the shopping.
This happened to us in multiple cities (NY/Miami/SF)
I've been all over the US and lived in two of the cities you mentioned. Dated and been friends with many different hispanic people and I've never seen this happen.
That's true of my friends and romantic partners of all races by the way. I can't think of a single time I've seen someone be given a racial discount here.
There were a few times at restaurants and grocery stores where they had access to items I wouldn't have, but that almost always came from speaking the right language and knowing what to ask for. I'm sure those places would have been equally happy to accommodate me if I know what to say.
I do have stories of those friends and romantic partners being discriminated against a few times.
Well we found it all the more surprising because our hispanic looking friend didn't even speak Spanish. But that's what happened. Maybe they mistook him for an illegal migrant ? In a similar vein, We also noticed that when our white looking friend was not with us, people started to offer us drugs in the streets, which we found hilarious.
There are rich areas and poor areas, touristy areas and off-the-beaten-path areas. But in US retail you won't find sellers discriminate based solely on the look of the customer in 99% of cases.