In school or office leagues, the loser refills every leaguemate's water bottle on demand for a month: before meetings, between classes, mid-conversation. A hydration-based servitude that plays out in front of uninvolved colleagues daily. The league has never been healthier.
The long haul: this is not a one-afternoon sentence. With a time commitment of one month, the punishment keeps paying out (for everyone else) long after the season ends. Long sentences need a written end date and a league-appointed enforcer who checks compliance.