The Wheel has an arrangement with the Empire, which allows it an unusual amount of autonomy. It maintains its own private security, and under normal circumstances, there is no visible Imperial presence within the station proper. A small garrison is maintained at the Imperial docking bay, but otherwise you will not see uniformed troopers patrolling. There is also an ISB field office, or at least a couple officers, whom Agent Ostel would know how to contact.
The casinos and boutiques of the upper ring are invitation only, but the middle ring has its own gambling dens and cantinas, pawn shops and massage parlors. Blood sports are also a popular draw for certain crowds, and advertisements for several arenas are on display. Information kiosks can direct spacers to whatever it is they might wish to find.
"Three hours, Banshees. Civvies and sidearms only." It is doubtful that anyone will not peg them for stormtroopers, regardless, but still...
Determined not to be pegged as a Stormtrooper, Den goes his own way, and winds up at the Barbecued Dewback. Such greasy-spoon fare attracts its share of humans, of course, but there are a plethora of other species also represented. A tired-looking Togruta waitress makes her way over and gives a practiced smile before taking his order.