What would it matter if your friends are black. Eyyyy.
Anyway uh. If you want to do it, 'cos I mean, that's you. Me, I find it unfathomable that people wouldn't wanna dress for dinner! But unless they see it as a really, really big thing, then just dress how you'd like.
If they're really baggy, then I'd say go for the jeans. You can always put your track pants back on as soon as you get home. If they're tight yoga pants or something, though, you might be able to get away with it if you wear a nice-ish top :)
Just don't even wear clothes. Then your guy friends can just stare at your body the whole time & you will be comfortable. Everyone wins. And we know since you have guy friends that you secrety want to have sex with all of them so this will really help you with that wish. Good Luck.