OK, I’ve just read your edits…
19 people is quite a lot, so I’m assuming the overall budget is pretty big?
I wouldn’t want thousands sitting in my Monzo account which was the only funds designed for 19 people.
If you put it all in a Pot, and then allocated each morning (or even before you were about to spend something), it would limit the risk involved (someone stealing your card and going on a contactless spending spree).
But… It’s a bit of a hassle allocating it each time.
I’d also 100% spread the money over multiple accounts (either do it with someone else going who has a Monzo account, or open a “throw away” account like Revolut).
This doubles your ATM withdrawal limit (if using Monzo), spreads the risk of losing all your money at once, and you wont have to worry about being the sole bearer of the responsibility.
If you wanted something more permanent, Starling don’t have limits on the foreign ATM withdrawal.
Starling (if you don’t know), are a fully fledged UK bank like Monzo - Some prefer it to Monzo, others don’t - A lot comes down to what user interface you like to be honest.
If you open a Starling or Revolut account, it won’t leave a hard footprint on your credit record (make sure not to take out an overdraft with Starling for this) - But Starling do report to 2 of the 3 credit agencies, so it would appear there as a current account (Revolut wouldn’t).
Someone might be able to correct me, but I believe the Revolut exchange rate is worse over the weekend (as the markets are closed) - I’m not sure if this affects cash withdrawals or not…
Edit from an article I’ve just found…
The digital bank might have 4.5 million customers across Europe - with 1.6 million users in the UK alone - but its travel service does not reflect that scale. The lender, founded in 2015, allows customers to withdraw £200 a month from ATMs for free, after that it charges a 2 per cent fee. It does not use Mastercard exchange rates.
The bank provides foreign exchange at interbank exchange rates without any additional fees on most currencies during the week, but charges between 0.5 per cent and 1 per cent on all currencies at the weekend.
If you don’t plan on using the account in the UK, I’d probably go for Revolut though.
Lastly, make sure you withdraw any cash in the local currency (and pay for things in the local currency) - If you are asked if you want to pay in GBP, always say no if you plan on using Monzo, Revolut or Starling.
Hope this helps