Since about 15 years ago, I have been thinking of creating a geo-referenced wiki of pubs, with loads of structured data to help searching. I don't know if that would be useful for anybody else, but I know I would use it!
Sadly, the many times I started coding something towards that goal, I ended blocked by something, and I keep postponing my dream project.
Independently of that, for the past two years I have been driving a regular social meeting in Dublin for CouchSurfers, called the Dublin Mingle. The idea is pretty simple: to go every week to a different pub, and make friends.
I wanted to make a map marking all the places visited. Completely useless, but pretty! So, I went back to looking into IkiWiki internals, as the current osm plugin would not fulfill all my needs, and has a few annoying bugs.
The code is still not ready for merging into Ikiwiki, as I need to write tests and documentation. But you can find the changes in my GitHub repo.
It is still a long way to go before I can create my pubs wiki, but it is the first building block! Now I need a way to easily import and sync data from OSM, and then to create a structured search function.