If memory serves I've seen these in Omega Leonis, remembered having a laugh when I saw the assignment to field test a bio weapon in Qo'Nos orbit too. I also saw these in the Ganalda system too, been a while since I have done them but stowiki shows they may appear in the DS9 space map and Zenas Expanse as well as the Sirius sector.
Man is a gaming animal. He must always be trying to get the better in something or other.
Warning, this poster tends to talk nonsensically when caffine levels fall below 80%.