I have set up a seed bell and a suet cake on the fire escape. Just strapped them there with rubber bands. The birds took a while to find the food, but they appreciated it during the last fierce snow of spring, (we hope the last, anyway!) last week.
I thought I might get pigeons or seagulls. That would have been exciting. But what has come are what my grandmother called 'little brown birds.' Meaning purple finches, mostly. Chickadees too, and grackles.
My only other experience with bird feeders was at home, years ago. We got jays there, and cat-birds, and what my gramma called 'cardigan birds.' (My dad said you could tell those by the buttons down the front!)