Always check before hand if there are going to be drugs or alcohol before going to a party. The other person might not always know but the best tool for refusal is to not put yourself the position to have to refuse drugs or alcohol
No, I don't think so
Hey! Do you want to come to this party with me tonight?
Okay! Then sure I love to go!
Will there be any drugs or alcohols
To refuse it is good to just say no. It is also helpful if you stay with a friend because they can back you up.
Do you guys want a drink? There is beer other there.
Yeah, I think we are good for now
No thank you.
Try to avoid splitting up, like these two characters did.
Okay
I'm going to go say hi to Kelly and Lilly. I'll be over there, be back soon
Another good way to refuse is to tell a little white lie to get out of the situation
Oh, no thanks I have work tomorrow early in the morning
Yeah, I'm good
Hey, Janny I saw that you hadn't gotten a cup yet, do you want one?
Are you sure?
Then if all else fails, it is good to know that you always have the option to leave
Hey Marissa. is it OK if we leave now?
Yeah, it's getting kinda late
Oh, you're right., Ok, let me make sure I have my keys