Is that bad???

So I’m 16 and I don’t drink or do drugs but I do have friends that take part in that. I was invited to a boat party which I’m assuming there would be alcohol. Now my mom hates drinking and drugs which I totally understand, but if I go to the party and not do it, does she have the right to be mad. And I know that peer pressure is a thing but honestly I could never see myself doing that. What do you guys think, would you be mad if your kid went to a party with drinking involved but didn’t drink?