CAI may refer to:
- California Initiative: San Francisco aka CAI:SF, a branch of the Initiative Collective, or
- California Initiative: Oakland-East Bay aka CAI:OAK or CAI:EB, a branch of the Initiative Collective, or
- California Initiative: SoCal aka CAI:SoCal, a branch of the Initiative Collective, or
- California Initiative: Los Angeles aka CAI:LA, a *defunct* branch of the Initiative Collective, or
- Rock N Roll aka "Roxanne Cai," a female RLSH and co-founder of the California Initiative: San Francisco.