DH and I got our first Moderna shots at a Fry’s (Kroger) pharmacy in Scottsdale, AZ this afternoon. We got there about 25 minutes early not knowing what to expect in terms of appointment/line management but no one was there—no customers at all, not even dropping off or picking up prescriptions at 1PM. It was very strange as this was in an otherwise busy part of town. We were in and out quickly and realized as we were driving home that the pharmacist did not make us wait for observation after the shots. 
Many thanks to @Mwfan1921 for the VaccineFinder link on the rollout thread which helped us find and schedule our appointments easily.