Is there somewhere close (with grass) to walk your dog?? EDIT: I'm not sure my dog can make a 3 min shuttle ride to go pee, is there an area just outside the hotel?

Not really close to any grass within walking distance. It's in the heart of downtown surrounded by cement.

It is just a short shuttle ride (3 minutes) away from one of the biggest and best grassy parks in Denver, Commons Park, which is attached to Confluence Park. Grassy hills meet the banks of the Platte in this great public space.

Its about 4 blocks from a park if you go towards 19th if i remember right. But it isn't safe after dark for everyone.