At hospitals, stuffy is better.
It's because of all the schedule 1 narcotics, and restricted meds. Looking in any way 'party' (sleeveless and bare legs... Yikes, just read your update: Wedding Apprpriate DEFINITELY falls into 'party' category) is a big red flag that could very easily keep you from getting the job.
Also keep in mind hospitals are kept COLD. Unless the air is broken in the admin wing (last place it gets fixed)... You're going to be shivery after 20 minutes. Shaking and in a pretty dress? The chances of you getting this job will be slim to none.
Go with 'stuffy'.
And on the off chance the air is broken, commiserating with HR is better than being all fresh and comfy, while they're dying and sweating.
They won't be expecting support services to be wearing a suit, but do follow dress code. In hospitals that's usually
- slacks (no jeans or shorts)
- business skirts (knee or lower)
- NO open toed shoes
- NO tanks or sleeveless tops or sleeveless dresses (unless under a jacket worn at all times in patient view/public areas/meetings...aka in your office only)
- NO billowy sleeves
- NO billowy dresses (both get caught on equipment and are a big liability for patient saftey)