As a sober alcoholic, coffee meets your requirements for a 1 on 1 convo. I like it for the same reasons! Your choice of days to meet is much more limited (people typically recuperate in a weekend morning, so each person really only has one day they can meet) but all it takes is one good 1 on 1 convo every few years to maintain a great friendship. In the same way that small amounts of alcohol act as a CNS stimulant, coffee boosts the convo too.