That singles out those who don't come from families who muck in with homework, may stigmatise less advantaged kids. However they may find they enjoy it! From what I've heard, homework clubs are pretty good (not heard of any compulsory homework clubs), a bit different to general classwork. Presumably they have a snack beforehand. It must be difficult for teachers with pupils who don't do the required work, even the minimum, so they have to try something. I hope the kids at your grandchildren's school, who have to go to homework club, get something worthwhile out of it. I feel sorry for youngsters, even in this day and age when things are far better. Still I suppose every age brings its own pressures.
I will tell you something that may make you laugh floo, from Nigella Lawson. She went to several schools, her parents took her away from a school if she wasn't happy (quite right if you are able to do it). She didn't like/couldn't cope with a compulsory subject, Geography. Her mother wrote to the teacher, ''Nigella is far too sensitive to study geography'', so she got out of it. Would that we had had parents like that! I thought it was marvellous.