An interesting thing about Meetup, a web site for organizing local interest groups, is that it ranks cities by number of people signed up for certain meets.
Burning Man City: Seattle
Body Modifcation City: Toronto, ON (# 2 is Tel Aviv)
Discordian City: Seattle
Magickal City: Charlotte, NC
Smart mob City: Denver
Coffee City: Chicago (Seattle was only # 6)
Comics City: New York
Dumpster Diving City: New York
Straight Edge City: Providence, RI
Pagan Parenting City: St. Louis, MO
Amiga City: Tel Aviv
Newly Single City: Toronto, ON
X-Men City: London (with a whopping 2 members)
Japanese Pop City: Houston
EFF City: Austin
Nanotech City: Minneapolis
What’s big, city by city?
Tel Aviv: Pagan
Rio: Linux
Moscow: Britney Spears
Perth: Goth
Madrid: Russell Crowe
Cairo: Knitting
Stockholm: Body Modification
Prague: Vampire (not the game apparently…)
New Delhi: Sex and the City
Islamabad, Pakistan: Gilmore Girls