While Stan Hieronymus and Daria Labinsky (authors of The Beer Lover's Guide to the USA: Brewpubs, Taverns, and Good Beer Bars) refer to mega taps as taverns with 80 or more tap handles, we are defining mega taps as 20 or more tap handles of micro and craft beers.
These are places where you can expect a wide range of beer varieties, and output from many different breweries. Some of the beer menus stay relatively static; others, like Concordia Ale House, change every time a keg blows.
We're covering Concordia, natch, Henry's 12th St Tavern, the Horse Brass Pub, and the Rose and Raindrop.
Are there others we're missing? Let me know!