Dropping by the Regional Lounge for your area in the NaNoWriMo forums is a great first step towards meeting up with Wrimos in your area. To see your Regional Lounge, you have to first affiliate with your region by clicking the "My Regions" link from your Author Profile, choosing your region, and clicking the "Join" link. From then on, your Regional Lounge will be visible at the bottom of the Forums.
Many regions have Municipal Liaisons---volunteer chapterheads who organize local writing events. Check your Regional Lounge to see the calendar of events for your area. You can also just post a note in your Regional Lounge inviting fellow participants to join you at a cafe for an impromptu writing session!