Boards
Rolling venn diagram share thread
Diplomacy
http://craphound.com/images/5509980924_8227fac906_b.jpg
http://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Supranational_European_Bodies-en.svg/400px-Supranational_European_Bodies-en.svg.png
http://upload.wikimedia.org/wikipedia/commons/2/2a/Supranational_European_Bodies_with_NATO_members-en.svg
http://lgbtq.missouri.edu/wp-content/uploads/2013/07/UK-England-Great-Britain-difference-geography.png
http://i.imgur.com/fbjGb18.png
Applies to way more than just design
https://alexanderwwhite.files.wordpress.com/2012/03/venn-diagram2.jpg
Mildly amusing
http://stephenwildish.co.uk/images/holy.jpg
http://loldwell.com/wp-content/uploads/2010/07/2010-07-14-bowtievenn.jpg