I've taken my now adult kids to a lot of theme parks: Disney Florida, Disney Paris, Alton towers, Thorpe park,Chessington, Legoland, Drayton manor, etc - the only thing that sticks on my mind re the people there were the families in Florida wearing matching, highly patterned PJ-like outfits - what's that all about?! I live in outer London and am used to seeing what OP lists so I don't notice. Just normal people having a day out.