Well, when I read the Twitter headline I was sure that this is a link I'd like to share with my coworkers. After reading it however it seems not to have much of content.
Some other reasons beside the obvious social ones:
1. If you aren't working on the same project you can use these lunch-discussions to generate ideas.
2. You can ask for feedback on any descision from people that are not actually involved in your project.
3. If you are working at a company where you can actually influence the company's principles, rules and processes you can make your job even better by improving the company's behavior. Which is far more fun if you are not doing it alone.
There are probably more reasons.
This article is really missing some substance beside the psychological impact of social interactions.
Common lunch can also provide value to the company itself.
Some other reasons beside the obvious social ones:
1. If you aren't working on the same project you can use these lunch-discussions to generate ideas.
2. You can ask for feedback on any descision from people that are not actually involved in your project.
3. If you are working at a company where you can actually influence the company's principles, rules and processes you can make your job even better by improving the company's behavior. Which is far more fun if you are not doing it alone.
There are probably more reasons. This article is really missing some substance beside the psychological impact of social interactions. Common lunch can also provide value to the company itself.