We do it a fair bit. I'd struggle to think of a month when I haven't done at least a couple of sectors in the RHS. Pretty obviously, it's normally when they run low on FOs during the bulges of days off requests. Once a year we jump in the RHS of the sim and do a normal take-off and landing, followed by a engine failure of some sort and a single-engine landing. No great shakes but have to remember to put the centreline through the left bollock and not the right :-)
Japan 767 (but they do it on all their fleets) and so does the competition.