slightly , but this thread made me think of skydiving...
in skydiving culture, any time a milestone is achieved (1st jump, 1st solo jump, 1st time pulling your reserve, etc) - the tradition is to buy beer for the drop zone.
at the place i used to jump, this WAS an enforced rule. you bought the beer for everyone every time you hit a milestone... (with a $20 max, and of course you couldn't open the beer until the airplane was tied down for the night...)
what would the homebrewer equivalent be? what should we do for milestones?
brew more beer?
back to the topic, bummer about the hydrometer...