If you are a software developer in the midwest, you may recall our day-long IndyTechFests in 2007-2010. Back then, we had dozens of hour-long sessions giving quick overviews and techniques on topics such as C# and SQL and SharePoint and MongoDB. Hundreds of attendees were drawn to these events, partly by the lack of a fee and partly for networking with peers and partly to learn about technologies that were becoming real in their organizations.
Udemy, Coursera, YouTube, and vendor videos have usurped the learning aspects of such an event. Meetups and regional conferences are still around in various forms, including the one-day StirTrek in Columbus, the Kalahari gathering in NW Ohio, and that conference near the Dells.