Bad JuJu's idea of an introductory ride is good but a lot of time and effort from your store. How about a contact info sheet for those that want to find riding partners? Only those that want to share the info could sign up and then provide it only to those on the list.

I like SB's training list. Add recovery to the training topics. That topic seems to be one of the last mentioned and people new or returning to exercise after many years don't know the concept and tend to do the same intensity ride day after day after day and wonder why they don't improve. The whole discussion of frequency, duration, intensity and recovery seems to be left out so much of the time, yet is is a pretty simple concept.