When I was being screened for a dermatological study, they started with me in one exam room, where the nurse went through a questionnaire with me, then asked me to disrobe.
There was no gown in that room, so she went to find one. I undressed, and waited several minutes until she handed me the gown through the door. Once I had it on, she opened the door and led me down the hall to the scale. The gown didn't have good ties, so I was holding it partially closed in the back, with lots of people passing by in the hallway.
Then back to the exam room, but the nurse found the blood pressure cuff didn't work, so I waited a few more minutes while she found another room. Then I was led down the hall, being told I could leave my clothes there. After checking my vitals, the nurse said I'd actually be staying in that room, and the doctor would be with me shortly.
Shortly, turned out to be more than 30 min., so I needed to run out to pay the meter. My clothes were still back in that other exam room, so I went down the hall still holding the gown somewhat closed in the back.
When I came back in, I went to the 2nd exam room, disrobed again, and waited in the gown for another 10-15 min., enough time to get some photos which are on my profile. Made good use of the wait this time.
The actual time I spent with the doctor was only about 10 min., because I didn't qualify for the damn study!