"Informal dining" refers to a casual and relaxed style of eating, where people can enjoy their meal in a comfortable and laid-back environment without any strict rules or formalities. Full definition
The space gets radically transformed into this single open space that combines a spacious kitchen with a central informal dining area. (hgtv.com)
The kitchen is made into an everyday living space, with an area for informal dining. (idealhome.co.uk)
Where space isn't an issue an L - shape ending with a central island unit provides informal dining space for the family or a place to chat with friends over coffee. (idealhome.co.uk)