i know its a powder room?! but....... replace the basin with a bbq, lengthen the top bench, and use lower bench as storage/seating.
BBQ, bench & bench seat
Outdoor kitchen with place for Weber Q
In Pictures: Max + Karstan's 'breathtaking' terrace
BBQ bench for bar seating & BBQ
simple timber bench with seating under & place for bbq (pref on bench)