I have smelt it quite a lot a Thorpe park - worst time being recent fright nights where it absolutely reeked of it outside the dodgems. Another time on the bus when there was only a handful of us and someone had some strong stuff on them.
Had a young lad come up to me asking for a cigarette paper which I didn’t have but I offered him a cig and he said he needed paper to roll a joint!
It’s the only park I’ve been to where you can smell it frequently