  Complex liquids flow is known to be drastically affected by the roughness
condition at the interfaces. We combined stresses measurements and observations
of the flow during the motion of different rough surfaces in dry liquid foams.
We visually show that three distinct friction regimes exists: slippage,
stick-slip motion, and anchored soap films. Our stress measurements are
validated for slippage and anchored regimes based on existing models, and we
propose a leverage rule to describe the stresses during the stick-slip regime.
We find that the occurrence of the stick-slip or anchored regimes is controlled
by the roughness factor, defined as the ratio between the size of the surface
asperities and the radius of curvature of the Plateau borders.
