Activity partners

I want an app on our club's Facebook page to allow members to contact each other via Messenger whenever they want participate in joint activities. So the idea is that a member goes to our Facebook page and selects a link to "Partners" (or whatever we ultimately decide to call it) which shows them a diary (divided only into days, not hours). They can then click on as many dates as they choose and create new listings indicating their availability, consisting of just their name and Facebook profile picture, unless they choose to add a short comment about what they want to do that day. In this way the diary would fill up with people looking for club members interested in joining them to participate in whatever they wanted to do or to suggest their own activity if the original poster had not specified anything. Members could then look through the diary by clicking on listings that interested them, either on the basis of which member had placed the listing, or which date(s) matched their own availability. By clicking on a listing any additional information that the original poster had included would then be visible. These details would not be visible until the listing is clicked. The member could then choose either to move on to the next listing that interested them (at which point the supplementary details would disassociate from the screen) or contact the original poster by clicking on links that took them to either Messenger or email. Any page in the diary could hold an unlimited number of listings. Only the original poster to be able to edit or delete their listing. At this point we are not thinking of any security to control who can post, read our respond to listings but we may want to do so in the future. This would consist of anyone interested I using the diary having to apply to a moderator who could choose whether or not to grant access and who would be able to revoke access at any point if appropriate.