You know how people keep talking about the Nazi Bar? Now say, you've been keeping your bar Nazi free for a while, and then, a massive venue opens up across the street that is way more inclined to cater to Nazis because they're huge and don't dedicate the resources in dealing with them. They reach out to all the bars in the area to and want to partner up by offering venue attendees one free drink at your bar. You can take that offer, and your volume of bar patrons goes way up even on slow days, but it will ruin the vibe for your regulars and you'll have to accept that it'll be a lot harder to keep Nazis out of your bar.