A red carpet was laid out - literally - at the home of minister Smriti Irani on a sweltering Delhi evening as nearly 300 women arrived in quick succession. This is a sort of First Wives Club: the members are either MPs or ministers or married to the BJP's national law-makers. On Tuesday night, they met for the fourth time in three years - the agenda was to discuss how they can contribute to the government's big push for better sanitation and hygiene.