1) School - this a good place to start! Schools have a wide variety people. Try to get involved in a club you are passionate about ! ( more variety)
2) Concerts - always good tons of emo cuties or country rockers just depends ( more musical)
3) Parties - awesome networking chances as well as being introduced to a hottie (more spontaneous)
4) Coffee Shop or Bookstore - always seems draw a plethora of interesting minds ( more intellectual)
5) Wine Tasting or Art Gallery - very sophisticated scene ( more classy)
6) Online- wouldn't advise it but you might end up liking it. Give it a shot! (more unknown)