Was just randomly trying to see if you could have different mouse-bindings association for double and single click on the same context, and decided to web-search a bit after it failed, "maybe there's some syntax trick or something," I thought.
Instead I found an
old post in this forum saying that, in completely different circumstances (out of window-management associations, seems to me), Openbox requires a triple click where other/actual DEs would require a double one....