Hosting an effective altruism discussion

(Edit: Xio points out that there's a more complete post about these resources on the EA forum.)

Recently a friend and I were talking about hosting effective altruism meetups in our respective cities. If you're considering hosting a gathering for people to discuss effective altruism, how do you get started?

First, find out who's already in your area. Here's a list of upcoming events, Giving What We Can chapters, and The Life You Can Save groups. There's also a map of individual EAs—maybe you'll find someone near you.

If you'd like to host a gathering, this document has some ideas from different people (including me). If you've ever hosted an EA meetup, please add your thoughts to this document.
How to host an effective altruism meetup

If you want to start a group at a university, Ben's writeups are especially well-done:
Thoughts on outreach
Student group notes

Jeff talks about how to start a discussion at work:
Effective altruism at your work

This is probably an especially good time of year to host a gathering, since so many people donate in December. GiveWell expects to publish their 2014 charity recommendations by December 1, so consider organizing an informal gathering a little after that. Maybe just sending out an email and staking out a table in your workplace's lunch room for those who want to discuss charity selection.

I've also found that a lot of good conversations happen one-on-one when someone says, "I'm passing through Boston! Want to meet up for coffee?" Take a look at the map of EAs, add yourself to it, and consider having a chat with people near you or near where you travel.