The categories section so far is very good but I personally would find a “Drinks” category very useful.
Being a Londoner I often go for beers/drinks with friends and colleagues, and as a London based company I can only assume this is a common occurrence for you, but at the moment I have to put these into the “Entertainment” category. As I leave "“Eating Out” for actual food/dinner.
I know I can ‘tag’ them but that is harder to see from the top down level on the spending tab.
Tagging is also quite labour intensive, especially if you go out on a night and order lots of drinks.
This would also be useful for coffee drinkers.
I appreciate you don’t want to overwhelm the spending tab with options but I think for British company this would fit in well with your key market and largest user group.