I totally understand what you mean. When my son was still a little beast, hehe, and I took him to the coffee shop with me, I had to always bring legos and crayons. That was enough to keep him busy, but I was his favorite art critic and artwork supervisor, so I had to be evaluating and praising his accomplishments between sips. So it's not just about going to the coffee shop, it's also about peace, a break. We parents can be very tired and need time off.