NEED HELP ASAP

Hello im new to this forum, and i am in need of help. Its my 16th birthday in 2 weeks, and i have no idea how i am going to entertain my guests. Its a fairly big party because i have both my friends and family over. Now my friends are co ed and are in the range of 13 - 23 year olds. I dont want any kissing games, and i have Music and disco area but i also want to entertain them in party games. What party games could i play that wouldbe good for that age range and also so they wont get board??I am having 25 friends, is it worth playing party games?? or is there too many people??