No, there are two word, discrimination and segregation. Men having a bathroom and women not (or vice versa) would be discrimination: one have bathroom, other don't. In having separate bathrooms men have a bathroom and women have a bathroom, no discrimination there.

No, this not even something we have to argue about. Simply look up the definition of the word:

http://www.merriam-webster.com/dictionary/discrimination

This conference is about the first definition, not the third.

Segregation on an axis requires discrimination on the same axis (if you don't make distinctions, you can't separate.)

> Treating differently by "distinctions" is discrimination, not just making them.

Segregation is treating people differently by the axis on which segregation occurs.