I have to wonder why would you want to ?
Some women have the knack of breast feeding sitting down or standing up - I always needed to be somewhere with something to rest my supporting elbow on, especially at the beginning.
I can remember when I was at a relatives house, sitting in the corner of a room, on my own, my son was covered with a shawl and the aunt still asked if I wouldn't rather do it in one of the bedrooms!
Someone commented that you might as well breastfeed in a toilet - wasn't that long ago when , if you were out of your house, that a public toilet was the only place to go and in fact in our local Debenhams, the "Mother's room" was in the ladies toilet, on a plastic chair, behind a grotty curtain and you were expected to change nappies on the floor!