The thing is that "broken windows" policing doesn't require locking people up and fucking up their lives for minor infractions. Police generally have the authority and power to say, "hey, don't fucking do that," without citing people or arresting them. Just tell people to throw their goddamn beer away if they're drinking outside.
And of course enforcement is totally selective. People regularly drink in one park near me. I don't have a problem with that. They behave. It isn't a big drunk party, just people having a beer or three with their game of bocce. They're also mostly white and appear to be well off so the police leave them alone. I'd be fine (not fan, but fine) if the police decided to stop the party, but there would be no need to cite people. Just show up a couple of times and tell people to knock it off. "Problem" solved.