That's what makes buying coins online much more pleasant. Don't have to worry about being judged.
I have gone to a few coin shows and I stick out like a sore thumb because of the color of my skin. I too don't dress in "high end" fashion, but comfortable since those convention centers can get very hot. I've had plenty of the scanning at me, being watched closely as if daggers are ready to be thrown. No thank you.
The dealers I have actually bought from were pleasant, answered any questions I may have had & were happy to make a deal if you bought multiple items, no matter the cost. Those are the ones that earn my return, but it's few and far between. And since Covid, I haven't gone near a show since nor do I think I may go again.