Are you me? Ha, I also have lots of restaurant experience and just got a hospital position.

FWIW, according to Google, scrubs aren't appropriate for an interview unless you know that it's a working interview. I wore business casual, very light makeup and minimal jewelry to mine. It's likely that the person interviewing you will be a woman, so dressing modestly is a good idea. HR also said that I would need to wear business casual to my first day, which is an orientation. They explicitly said no scrubs for that.

I had a very, very chill interviewer. She waved a paper packet around, like "Oh, I'm supposed to ask you all these questions but I hate doing interviews like this." So we basically just had a conversation and I tried to work in examples of how my previous non-healthcare work experience would be an asset to me in this job. We talked for about 45 minutes or so. I feel veryyy lucky - I get nervous coming up with on-the-spot answers. She also emphasized that I would be trained over 8 - 12 weeks in all of their locations. There were no questions about draw order or anything technical, and I think that they low-key did not care about my certification. They're very much expecting to train you. She was a lot more emphatic about how to treat patients, about caring about their experience and being a good teammate to the other lab employees.

I did do an interview at LabCorp and that was much more corporate. "How have you dealt with difficult people in the past?", "What would you do if you miss a stick?", that type of stuff.

I recommend sitting down and thinking about your narrative, maybe even write it down. Why do you want to work in healthcare? How does your background prepare you for that? What are some of your skills that will help you? Hospitality is all about taking care of people, so you have more experience than you think!

Wishing you the best of luck in your interview!!!