James -
Get yourself a part time job, and save, save, SAVE. You never know at what point your parents dub program will kick in and they kick you OUT of the house.
Education. YES. It is expensive though, so the savings help.
Try fading slowly. By the time you are ready to leave home your parents will have gradually adapted to the fact that you are not "pioneer material". You are 16. That means until you are 18, you only have to attend at most 104 Sundays, ditto the others. Get a calendar and mark them off like a prisoner in jail.
Revising for important tests and exams will give you leverage to miss midweek gagfests. If that is not possible, try doing mental revision at the Kingdumb Hell, make cryptic notes only you understand. (Maybe they will think you are being spiritual, and noting points from the talk.)
If you do go out on Saturday night, under NO CIRCUMSTANCES MISS THE MEETING ON SUNDAY. This will only alert them to the fact that you are on the way out, before you are ready to deal with it. Sunday afo, REVISE for those pesky exams.
GOOD LUCK
HB