Its easy, he probably told them. And btw OP, they cant stop you taking holidays because you dont drink, your probably too slow in taking your holidays. So really, you deserve it. If you're not fast, you're last.

It doesn't matter. Just don't show up and tell them you were drinking, after all, their REASON for keeping you there is because you DON'T drink. If you said you did, you'll be alright.

yeah, what's "tee-total?"

it means you don't drink

But how does tee-total = doesn't drink?

http://en.wikipedia.org/wiki/Teetotalism

huh, learn something new every day.

How does "delicious" mean something tastes good? It's a word. It has a meaning.

yeah but tee total just sounds gay. and incorrect.

Ooh. Burn.

There's no law that says you can't make business decisions on someone's drinking habits. They don't need a reason at all to schedule an employee to work.

If his abstinence is based in religion, then there's definitely laws that prohibit this.

But the suit will only work if OP can prove that's why he/she was scheduled. The boss can always claim OP didn't request it off or something. There really is no way of proving discrimination here.