Funny you should ask! I was on the train from ZRH
(or thereabouts) on Thursday - It was hot so I went straight to the Resturant car and ordered a beer.
Just before the train left the station three students from Miami got on the train, looking very confused. They tried to speak to the waiter in the resturant who spoke little english and wasn't much help. I intervened and with my English/French and (little) German managed to sort out they were on the right train, and they could indeed enjoy a beer (otherwise they would have to schlep their baggage to the next carriage). Do they take euros, they asked? I said probably but don't you have any Swiss Francs? What's that, they asked? Sigh. Apparently 'somebody' had told them that in Europe they only needed euros. I asked them if they knew how many dollars there were to a euro ... no idea. The waiter came along with a 1/2 litre tin of beer and asked for CHF5.60 (about the same price in a bar in Switzerland). One had a 10 euro note but the other two only had 20s. The each paid and received their francs in change - the exchange rate, from what I could tell wasn't bad (but it wasn't great either). They couldn't understand why they got CHF back in change and why they would need it anyway!
The last comment, before leaving the train at Bern, was they certainly hoped their hotel had air conditioning. It was a two star hotel!
I certainly hope they enjoy their stay here, but what do they teach these kids these days. They really shouldn't be let out on their own!