Hi Sarah,
I think your best bet will be to start a new one yourself. If you do, we'll help by giving it a plug on Facebook and Twitter, and in our Friday newsletter.
Since the meet-ups have started, we've observed a few things that can really help get them underway:
1. Rather than trying to get people to nominate a date that suits them, suggest a time and place that suits YOU, and mention in your thread whether you're open to other alternatives
2. Choose somewhere central to other businesses, and with easy parking
3. Suggest a regular catch-up time (e.g. every fortnight, or the 2nd wednesday of the month), and be prepared to continue for a while before it builds momentum.
4. Try not to kick off in school holidays.
Good luck - I hope you meet a great bunch of new mates
Jayne