I think that alcohol or not, the social structure of parties in college is very different from when you are young. For one thing, people seem to disregard invitations. Everything is word of mouth. This means that the people you invited don't feel obligated to come, or even to tell you that they're not comming. People also feel free to bring extra people, and to come and go anytime they wish. Its much more casual than other parties before or after college-age. I'm like you in that if i have a party, i like to know exactly who is comming and when and how long they're staying. I didn't do anything for my 21st birthday because i knew it would be dissapointing. This year, I'm having 5 good friends over to spend the night (i'm a girl and i live with my parents 30 min from school). I might suggest that instead of trying to have a party, you could invite 1, 2, or 3 friends out to do something fun, or to your place for a bit. Make it a planned, private get-together, not a party. I hope you have fun. Let us know how it works out.