Sell Meetup Fabric backed (so they do not fall off) name tags (that are in a roll to be printed real time), suggest/sell software to print it, help meeting maker with RSVP list (on-line), Print name tags with QR code, goading users to update their profile (at the meeting), allow links in the profile... to FB, LinkedIn, urls from work.... Allowing users to scan QR code and get the contact info downloaded to their phone and an email with the contacts they scanned at a Meetup.

Consider printing permanent generic name tags for people to use at events .. with name, firm, QR code