Give them 2.54cm, they'll take 1,609.3m

It's almost like the ENTIRE REST OF THE WORLD don't drink beer...

Pints have long since gone away for everything bar draught beer. Bottles and cans of beer? 330, 440 or 500ml, 600ish for the big Indian lagers.
Milk is sold by the litre... just in odd non-round numbers. Except for those brands that are round numbers.
www.tesco.com/groceries/en-GB/products/260086626

And WHY do we still measure the fuel economy of our cars by miles per gallon, when we haven't bought fuel by the gallon for 35 years...? And the only country that does use gallons uses a different size...?

Then there's stones, pounds and ounces. Remind me again (again) which one's 14 thingies to a thingy and which is 16?

Don't even start me on US recipes with cups of flour (how well do you want me to settle and pack that in?) and sticks of butter.

Yeh, they tend to be called "customary" units in RightPondia. Can't think why they might not tend to reference the British Empire...

Don't even go near the history of how they got to be what they are today - as ever, the US have tended to stick with what we had a few centuries ago, like in so many linguistic ways. Let's just say that there were three sizes of gallon. They used one, we used another. But the litre's been consistent longer.

Well, I'll be 6'4" until the day I die.  At which point I will be too long for a 1.8288m coffin.  Unless you squish me up a bit.

Doesn't have quite the same ring to it.  And certainly lacks in... dignity.  To whit airplanes.

(fwiw bracknellboy, amongst others, have met me in real life).

We will never complete the transition. I'm sure many of us on here were bought up in a period that saw the switch to decimalisation (the 50th anniversary was a few days ago I believe), were young when it happened, or have spent entire lives post that time. However we seem to almost universally have a very ambiguous relationship with our use of units. My bathroom scales are consciously set to Stone/pounds; but I would no more want to order my spuds or sugar in pounds and ounces than I would want to measure the distance between London and Birmingham in Kilometres, nor check how much over the speed limit I was in km/hr. I know my height in feet/inches, and still always have to go convert it into metres every time I need it so*; my waist line most definitely expands in inches (or more optimistically, fractions of), and thereby get frustrated if I have to convert the length of a belt from cms. If I need to know the length/depth/width of something, for the purposes of DIY, I get annoyed when my (somewhat younger) wife fails at first to provide the requisite measurement in cms, and gives it in inches instead. Nonetheless, if I need to put a screw into something, [hasten to add this was not meant to be adjacent to mention of my wife, it just turned out like that], then I most definitely need to know its depth in inches (or do a conversion in my head). Meanwhile, I get very frustrated that I can't setup my cycle GPS to give me "Distance ridden", "Avg. Speed" and "Max Speed " in mph, but "Ascent" in metres. 

I happily buy my petrol in litres, but I am still far more interested in how many miles to the gallon I get from my car, than I am in how many litres it takes to do 100km. I do however have ingrained in my brain how many litres there are to an imperial gallon, and know there are 8 pints to the gallon, meaning there is less beer in a continental half litre than there is in a good old British pint. But for the life of me I cannot remember whether the US gallon is bigger or smaller than the UK one (actually, I think its smaller and I think that might be something to do with the shrinkage of a barrel during the Mayflowers journery, but that of course may be urban myth).

As a graduate of physics, I am however delighted to say that I would never for a second contemplate measuring distance in anything other than metres (or light years) except when driving/riding; and everything of course has a mass measured in g/kg, except apparently for me.

I have no idea how many feet chains there are in a furlong, or furlongs in a mile, nor even whether those are the right sequence of measurements. I'm however also pleased that I can do pretty good approximate mental arithmetic conversions from feet/yards to/from cm/m. 

I'm even more delighted to say that I have no idea what a florin was, that I can categorically say that a base 12 counting system is a bit bonkers when you use a base 10 number system. 

As I say, I think as a nation we have a fairly ambiguous relationship with our systems of weights and measures.

*Whatever units its expressed in, it is however considerably less than that of registerme , and no precise measurements are required to know that.

Not to mention diamonds in carats, gold in troy ounces, horses in hands high...

I have and would happily drive on the continent, and require nor desire any conversion to miles....except possibly at the contemplation of a journey to get a 'feel' for how long it is in the world inside my head. 

As for the screws, you clearly haven't seen the stock of screws I have in the garage. Every pack is a No. 6,8,10 x 3/4", 1", 1 1/2 ", 2, 2 1/2". And yes, if not doing it by eye, I also have to go do checks to figure out what size drill in mm I need to accommodate it. 

In the UK, we live in a bizarre 'half pregnant' universe.