Not an odd question...barefoot or shod.
I can not sew with anything on (my foot that is)and this can get pretty interesting at camps and retreats. I just make sure I wear slip on type shoes and hope no one is offended. Of course it is not the most comfortable on the treadle machine but what can you do?
The other question I would add is: Do you use the right or left foot or in my case I switch hit using either foot.