A ‘Tweetup’ is an offline meeting of people who have met and organized on Twitter.  This is a great way to find other Twitter users in your area, who share your common interests.  Here’s an HR related tweetup I found in the San Diego area on http://twtvite.com/:

http://tweetup.meetup.com/ is another good site, because it draws users from the already popular meetup.com.  These sites can be a great tool to take your networking strategies to the next level.  You could organize a Tweetup with local financial advisors to establish a referral relationship, or hold a tweetup with local parent publications for marketing purposes, for example.  The possibilities are endless!