People think of getting these things from hotel beds, but they can be picked up at places like movie theaters, public bathrooms, airplanes, trains, taxis, or other public places as well.
A NYC City Council member has advised people not to sit on wooden benches. The benches are all up and down the Broadway mall (the wide divider of Broadway that begins at around 60th Street) and are frequented by the homeless and residents of the SROs.