A Beer a month, is nothing.
Thinking about what you say here, & pondering ...
Maybe it's time for the "
MySwag Lunch Money Challenge"
(Pat. Pend.) Lots of people grab a coffee off Maccas or wherever for the trip in to work, go out to the coffee shop & get another for smoko, across to the sandwich bar for lunch, then a couple of beers at the pub / Club on the way home ...
OK, so on everybody's first day at work each month, tally up what you've spent on all of that, & donate the same amount to the server!