Have some experience with NA but assuming functionally the same, and there isnt a set threshold. If you are unable to stop taking a substance in any circumstance that is negatively impacting you then you are considered and an addict. Whether thats just every Friday night or every day. Its the inability to stop that makes you an addict rather than the frequency. Tbh i didnt get on with it at all, waaay to goddy for me but I appreciate the work they do for people.