Joint North Wales/Midlands/North West Idea
So I have an Idea, unfortunately in practical terms Wales is unlikely to get a non-self organised Monzo meetup particularly soon simply because of the size of the cities (for example in the last poll Cardiff has ~346k residents and Leeds has over twice that so Leeds was always gonna win), so it stands to reason that English cities will always win in a vote because they are likely to have more members.
So here is my suggestion, make the Monzo meetups in England easy to get to for us across the welsh border (I am in fact English, I just live here).
So I’m pretty sure there has been a meetup in Manchester, why not instead of Manchester make the meetup in a place like Chester, it’s still easy to get to for those in England (both the Midlands and North West), BUT is also easy for anyone in the top half of Wales to get to within ~2 hours by road with city centre parking. Whereas Manchester is up to 3 hours with little or no parking.
A similar idea for south Wales would be Bristol in that again it has a massive catchment area that spans not only cities but also allows people in smaller towns a chance to get there.
I get that cities have the overwhelming number of Monzo users, just my suggestion for an approach where not just people from massive cities get to attend easily as well as those from smaller provincial towns, whilst classifying community events into single areas is good from an organisational point of view it doesn’t necessarily work in practice because of the comparative size of places and transport links between them.