While I agree with letting the birthday girl go, I don't think this should mean letting the other friends go. Unless they all got together and planned a surprise party without including OP, the beef between this girl and OP is none of their business and dragging innocent people into the problem will just make OP look worse than the other girl. Besides the fact that this girl pulled a jerk move by having the party where OP works, she doesn't HAVE to be friends with OP just because they have some mutual friends- unless she led OP on this entire time.

I don't really understand how this stuff happens

unless it was a surprise and she didn't plan it.

yes and get fired or get worse consequences. so worth it.. plus that's just fucking nasty anyway...

I wouldn't risk my job and behave unprofessionally because of a personal grudge. Shit like this done by people who would are the reason no one takes hospitality jobs seriously or respects anyone working them.

It's just a little boogers and cum!

How exactly do you charge someone double? I mean I would notice if I was charged 20 dollars for a 10 dollar dish...

So you can look like an ass AND get fired

11, I wouldn't care at that point. They've made their decision.

Because bad friends are a great reason to get fired

And in this case there are 10 of them! OP sure has been dished up a serving of bad luck in the friendship game.

Yeah. No need to actually do anything. Just serve them the food and tell her you've included something extra special just for her. If she complains to your boss you simply have to say "She's a good friend. I meant I included extra basil cause it's her birthday and she came to my workplace just so she could be with me on her birthday."

That sounds like Penny serving Sheldon at the Cheese Cake Factory.