If you want to have a unique bday party... Have it in close dark room... No lights... perhaps just glow sticks only... That would be a blast... with up beat music and finger foods... Otherwise just have it in McDonalds...
laser gate, bowling, indoor rock climbing, indoor roller blading they are pretty much perfect for all ages under 20 as long as you invite your friends everyone should have a blast. sometimes it gets expensive depending on how many people you invite though
On the beach during sunset and then to a restraunt and then to the Natural History Museum for a sleep over under a big blue whale or you could hang out in your house and relax and play games with friends and family :) HAPPY BIRTHDAY
Well lets think gender wisely and age wisely so everyone is accepted: A holiday, movie theatre, swimming, the zoo, in the park, amusement park, bowling, etc. I say if you invite people and don't know their interests very well, call them up and vote where they want to go! Hope this helps, and also do what you want to do on your birthday but make sure everyone likes it!