The quality of outcome of the meeting is not overly influenced by where that meeting is held. Some might disagree. Consider this though; important decisions have been made in corridors, car parks and cars. These meetings might seem casual - but you’d be mistaken. Look beyond the superficial.
A chance verbal encounter in the corridor between colleagues could be legitimately described as a business meeting - if in so doing it furthers progress towards the purpose of resolving problems or making decisions. If it doesn’t meet that criterion then in this context it’s merely a meeting by chance.
Traditionally, most business meetings at work are more formal, with a prearranged time and venue. Because it’s always been like that doesn’t mean it has to stay like that! It depends on the circumstances. If a formal meeting is required, then the venue should be appropriate.
However at one of the major IT companies I was a consultant too, the departmental heads of the creative and innovation teams put all the coffee machines, drinks dispensers and related tools in the middle of each floor’s work space and surrounded these with the most comfortable chairs and sofas they could afford. They positively encouraged team members to congregate there as often and for as long as they chose.
The quality of the innovations that resulted from the less formal structures were significantly higher than when brainstorming sessions took place in a more formal setting. On the back of that radical approach to meetings, albeit the niche ones of brainstorming, that initially small company floated on the UK stock market and the shareholders lived happily ever after.