My husband says they have two or three each week at his place of business (woman pregnant, just gave birth, going to be engaged, married, found a lover, etc.) and he has to chip in $10 for every celebration.
My husband doesn't have to pitch in any money for any parties at work. 
mnli hypothesis: My husband doesn't have to pitch in any money for any parties at work.  premise: My husband says they have two or three each week at his place of business (woman pregnant, just gave birth, going to be engaged, married, found a lover, etc.) and he has to chip in $10 for every celebration.