Chris

I live in CA i live with a retired man, he acts like the caretaker of the home but isn't really in charge of it just acts like it. Lately he's been getting on myself and other tenants for staying up late and having a few drinks. He posted "rules" that he says the landlord made up and it says we can only stay up till 10am each night and have 3 drinks in a 24hr period. The reason i know the landlord didn't make this is bc the landlord comes by on the first to pick up rent and parties most of the night with us drinking wine and beer staying up late. During the week i don't drink or stay up late because i work early in the morning, my roommates do including the retired one. I got threatened with 30 day notice not from landlord but by the roommate and it was for something that another tenant did. 

Does my roommate have legal ground to do this?

I pay rent on time and usually keep to myself especially if i have a drink.

I have a contract and it doesn't specify on any of these rules.