Can't give any specific recommendations, but we stayed in Montserrat area and from south of Ave Belgrano to San Telmo there are a number of decent bars. It will help to emphasise Scottishness when making a request.
Go as soon as you can. Currently very cheap but it’s not always so. Inflation goes up and down like Eva Peron’s knickers.
Bustling city with lots of interesting districts to visit, deep history, great architecture, first rate transport system and very, very nice people.
Twenty odd football sides worth a visit too. I only made two of ‘em.
Its fab. Was expensive when we were there, 2017, inflation was 40%, but might be better now. Beautiful city, good food, opera house is stunning. We went on to Patagonia and then Iguazu Falls both of which were on the bucket list and exceeded expectations.