I would think in some cases it would be a better indicator of workplace culture than an influence on the culture itself. I also think that extra good etiquette

I would think in some cases it would be a better indicator of workplace culture than an influence on the culture itself. I also think that extra good etiquette in the break room can have a positive effect, especially if the users around-the-clock make a serious effort to always leave it better than they found it. And not least when the employees end up respecting each other somewhat the same way, better than their jobs require. Or sometimes even better than the company itself treats them.