To help reach out to as many people as possible, and allow as many people to participate - no matter where they are in the world - we'd encourage each group to try and do some of the following:
Don't wait until you've got a big group before deciding on a date and book. Give people something concrete to think about when they're deciding whether to join.
Set up a Facebook group or a Google group for your area's book club. Add links to this wiki so people can find it.
Take photos at your events and post them to flickr - use uxbookclub as one of the tags.
Set up a ustream.tv account and stream your book club meetings live. This is really easy to do, and let's other people sit in.
Get everyone to write down the likes/dislikes on index cards and hand them in at the end. These can be written up and posted for others to see.
Print business cards for your group and take them around to local professional meetings to attract interest. Or, tuck them in relevant books at the bookstore and the library.
Involve a local Design school or use its premises to conduct the meeting.
Do you have any thoughts on what else we can do to share the experience beyond our own little groups?
Add your idea here!