It was either that or put obedience out in a ring on the main floor (where everyone else, including agility showed). Obedience people demanded a side room.
Exactly - but people did show their dogs and biggest complaints was not about bitches in season. It was the noise, crowds, spectators, and so on.
***ETA - I train at a location where bitches in season are allowed as long as it's not the weeks when they are flagging etc.... people may opt to keep their girlies at home because their brains are mush while they are in season, but generally speaking it is managed fine.