Lax parenting. Child friendly should be taken to mean concessions have been made to children, be that baby changing facilities, steps in the toilets, colouring books and pencils at the table, maybe a selection of picture books, perhaps a slide or swings if there is a beer garden.
It shouldn't mean the venue is child dominated by playing, shouting or running children. That is what a park, nursery, soft play centre or play group is for. I know, I have spent years in those parks, nursery, soft play centre and play groups.
I once met a friend for coffee in Waterstones. It was a regular place for her and her children apparently. She liked it as she could have a leisurely coffee, but the two children were in a confined space that she didn't have to tidy up or supervise too closely. Her children were naked apart from nappies or pants. They ran around the otherwise quiet shop, shouting, dropping food, taking books off the shelves and generally making a mess.
She informed me shortly afterwards that other customers had complained about the children's behaviour in a bookshop and she had been asked to take her custom elsewhere. She couldn't work out why
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