It's interesting because I — and as far as I can tell, most of my circle — do a similar sort of thing but it's much fuzzier. Nobody is really keeping track of p

It's interesting because I — and as far as I can tell, most of my circle — do a similar sort of thing but it's much fuzzier. Nobody is really keeping track of particular dollar amounts, but we seem to have excellent group memory of who last bought who what, who paid for the last round of drinks, etc. I wonder which style (particular vs. fuzzy) is more common.