What's the opposite of the Boston Tea Party?

Over in England, the Old Nun's Head Pub in Nunhead, South London has a special post-US election sign up, for wandering American leftists freaking out over Trump's win. There is a free beer and a hug. Aww, isn't that sweet.

But notice something weird about their stipulation at the bottom? "Proof of nationality required". As in, this is something intended solely for U.S. citizens, and not just people who wander over from any other country in the world. Just like, I dunno, to pick something off the top of my head, providing free healthcare to Mexican immigrants at taxpayer expense...
Providing healthcare to illegal immigrants costs us some $11 billion annually. If we were to simply enforce the current immigration laws and restrict the unbridled granting of visas to this country, we could relieve healthcare cost pressures on state and local governments.
In fact, "proof of nationality required" sounds almost like a good slogan for the next four years of a Trump presidency. We have real hope for you. #HopeNotHopsNotHate. Over the next four years I will make your life better. (Note: proof of nationality required)

If it's good enough for a "sprawling gastropub" it should be good enough for U.S. taxpayers.