Advertise like mad --coffee shops, grocery stores, public bulletin boards, schools, local internet announcement pages (even Craigslist), anywhere you can think of-- and pick a day and time that works for you, and wait at the 'meeting place' you decided upon for as long as you said you would, then walk the route you announced...when you said you would.
You'll have people who come once, people who come all the time, people who come from time to time. But it will take a while for the group to gel. Give it 6 months before giving up, and make sure you keep up with the ads.
at 11:24 PM on Sep. 17, 2010