I was in Korea and had to work on my 21st bday, so A) I had already gotten the "party" out of my system (drinking age there is 20) and B) I was plumb tuckered out. I finished work, bought a 4-pack of wine coolers, went back to my room, and drank them while playing Half-Life deathmatch over the barracks LAN. Then I went to bed.
Going out for dinner with family sounds perfectly acceptable to me.