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.

I live in Miami and when going out with Cuban friends, have never seen this.

But I also don't go out often, and if I do, it's just to eat usually.