Jonathan Sriranganathan, Greens candidate for Lord Mayor, has posted a lengthy post on the alien site about it. You can find a direct link here or an archive.org link here.
Additionally, here is a direct link to a spreadsheet his team compiled showing all the clubs on Council land, and how many pokies they have. The claim is that BCC is the biggest landlord of pokies in Brisbane, at 2,000 machines, ahead of Treasury at 1,300.