We have one table - so I suppose is a dining table - it is used for everything though. We nearly always eat there - occasionally sat on balcony but mainly there (TV always off).

Work days - (4 days a week)

Breakfast - I eat mine on the go (which often involves children stealing the odd spoonful, children have theirs at daycare/before school care) - I would love to sit down for breakfast altogether but have to leave the house by 7:10 and I am not willing to wake the children any earlier.

Lunch - Daycare or School - or work for me - I take my main meal of the day with me and eat it there (DH does the same)

Tea - We all sit down at the table - even if DH and I are not eating yet (we both prefer to eat main meal at lunch time) we still sit down at the table with the kids (but when DH and I snack later won't be at the table generally)

Non-work days/weekends

Breakfast - Sit down together for breakfast

Lunch - If eating at home we will all be sat together at table, often we will be out so either will be a snack/picnic lunch somewhere or a sit-down meal.

Tea - Sit down together at table

(We haven't actually got enough couch space for the four of us to sit on - so eating on the couch wouldn't work :-)).