A few years go, when I was still a landlord, one of my tenants insisted on paying me in cash. He would physically bring me a stack of $100s every month. Fortunately, I lived a block away from a Chase Bank at the time, that accepted cash deposits at the ATM.
I try to eliminate the need for carrying currency whenever possible. Right now, the only place I ever use it is where I get my hair cut -- as they only accept cash.