Did you try open table app? Or give them a call.
You can also put in the number of your friend(s) in the US. Hotel, US cell phone, etc... Good luck. Keen's is worth the hassle because it's very unique in the US, with a lot of history. Mutton chops are amazing. Personally, I liked their T-bone. If you really cannot make a reservation for one reason or another, you can still walk in without a reservation and try to get a table. If no table is available, I love eating at the bar, same menu, less uptight, with nice drinks available at your discretion. So if you are nice to hostess/host, you may able to score a seat at the bar, too. BTW, you can easily strike up a conversation with your neighbor at the bar and be entertained (or entertaining) if the chemistry is right.
Assuming that you'll be staying at a hotel, why don't you use their phone number?
Gove them. Call
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