There are so many themes that you can throw for your sweet 16 party. The only problem is, you didn't give us any information about what you want!
We know that you do not want to have to dance, so let's scratch out "dance party".
Can you provide a little bit more information about your hobbies/ interests and wants? What's your favorite color? Where will the venue be? How many people are you inviting?
The more information you give, the more likely you will find that perfect sweet 16 party theme.
If all else fails, just get your gang together and go somewhere local.