Once did that at Dundee on a UAS summer camp, out of Leuchars. We were using the airfield for circuit consolidation as it was a bit tricky fitting in our young students in little Bulldogs with those punchy mates doing 4-ship run and breaks in their F-4s and shiny new F-3s.
Some local pilots were flying crosswind completely across the Tay, into the distance downwind, recrossing the Tay, then onto finals. We were getting three circuits to their two, sometimes four, without cutting them up, by flying the normal oval circuit. ATC were more than happy, in fact they thought it quite amusing. We were potentially safer because if the donk stopped we could make the field all the time except on climb-out.