If you are straight-edge, that’s great, keep it up!  People generally don’t care if people don’t drink or smoke at parties, so don’t try it if you don’t want to.  You probably have heard this before, but it is best not to get caught up in that lifestyle.  From experience, many people can tell you that the parties that have smoking, alcohol, or other possibly illegal substances are oftentimes not worth going to.  People will say to “go for the experience,” but it truly is not worth your time.  It isn’t “fun or rebellious” when the cops come and bust that party you’re at, and you have to remember that the people you surround yourself with help shape you as a person.  You may be straight-edge, and are therefore a good influence on party goers, but if you want friends, you want friends who will make you a better person.  Party goers are not bad people, but they do make choices that don’t always promote a healthy lifestyle.  If you want new friends, don’t go to a party to find them.  Half the people there won’t remember your name by the end of the night!  You can be fun and even rebellious without going to parties, so go make some friends who will help you do that.