Marijuana is a plant with many multiple uses, there is two types. one with thc which produces the high euphoria affect. Cbd which is used more in random things to help for example joint problems you can use cbd oil
I wouldn't accept especially if I wasn't comfortable doing it. If they would pressure me more, I'd find a close restroom and either call or text someone trust, or i'd get out the situation. Being under peer pressure is a big thing, and not knowing what to do is even worse.