Map is based on this year’s Pseudo Brewers Stage data, so it includes all kinds of events, including for example some tastings that caught my interest. It does not include a few events that aren’t tied to a single venue or even a single city, such as Zwanze Day or Baltic Porter Day.
The size of each dot is based on the number of users who attended the event (you can see the exact numbers and other details in the popup). The color of each dot represents the country where the event took place. The map is probably best viewed on a computer rather than on a phone.
One more thing: unfortunately, I don’t have the full festival names in my data, so what you see are the folder names from my hard drive. Fortunately, the popups show the most popular festival venues, so in most cases it’s pretty easy to figure out which festival it is.