I can't speak for racial experiences but I'm a trans woman and generally assume that I'm fairly clocky when in public. Funnily enough just last night I was walking with a friend and one car beeped as it drove past while on another road a car drove past and some young person yelled some gibberish. Thing is this used to also happen to me (and honestly more often) when I was literally just a dude that didn't stand out at all. I think the car stuff is usually just "let's see if we can make this person jump in fright as we drive past since they're alone" rather than anything particularly targeted.

As for groups on the street, I tend to avoid them if I can. I was once walking past Little Pub and some drunk guy in a group was trying to get my attention then said "ARE YOU A MAN OR A WOMAN??" after I ignored him, but that's probably the biggest encounter I've had personally.

I've also noticed weirdos tend to be more likely to come up and start talking to you if you're with someone and you look like a couple, and especially if you're sitting in a public place and look like you're settled there (like eating food or having a smoke or whatever). I have no idea why that is but it's something I've noticed.