A 'Seattle dog' at the RD is a plain hot dog with mustard and ketchup on the side. They also offer a 'aces poker dog' for $2, which I can only assume is a plain hot dog, aka a Seattle dog (Maverick).
For the $5 poker dog special, you get a Seattle dog with fries. Which is a plain hot dog with (pretty good) fries.
Why do they offer a plain hot dog under two different names? It is a mystery!
According to wikipedia, a Seattle Dog is a hot dog topped with cream cheese and sauteed onions. I'd like to eat that.