Author and me have so much in common. From journalism to software engineering and our formative career shift years were spent on home made music apps. Now I’m wondering just how many of us are out there.
Unfortunately it’s abandonware now. It was called Showhopping and it would use the Scrobbler API and a list of your favorite bands and find out if any bands you might like (including the ones you listed) were playing in a given area any time soon. You could give it a location and a time range and it would give a list of shows playing on a map with a percentage back based on the likelihood that you’d enjoy the show. It was very lightweight with no sign up and I had it in mind people could use it like Yelp essentially, just ad-hoc.