So I work in an organization where we record our time spent at work in a program called "time management system", for the most part its pretty relaxed (it gets approved by your manager and what not). This is my first ever corporate job, I'm an entry level "software engineer". 

So I recently had a lunch meeting at a cafe. After finishing the food we continued to discuss work related topics on my colleagues iPad for an additional half hour. My question is, at what point does lunch become a regular meeting? Or is the whole lunch meeting just considered lunch? If we didn't have to record our time at work and time on breaks this wouldn't really be an issue but since we do I am unsure.