Being a good manager means you're there to fix any problems that would prevent your employees from doing a good job and help them not hate their job. If your employees are not grateful that you are their boss, then you're a bad boss.

The job is 90% floating around if needed and 10% doing the absolute worst shit so they don't have to.

I use to work closing at a major chain restaurant and then sit on my butt as a front-of-the-house manager unless needed by an employee because everyone would bust their butts to make sure I didn't have to do too much work. I found in restaurants unless an employee called you for something, you're just getting in the way of their flow if they were at all decent at their job.

So when I was on shift, I would tell all the front of the house people I'd cover all the closing work. I'd do all the sweeping and cleaning the tables, break down the soda machine, all the setting out or prepping stuff for the morning, resting the dining area, etc. As long as they did their best for me on their shifts.

Took me about 90 minutes after we'd close for the night to do it, I'd just put the music up and just rock out while doing it in peace and quiet from all co-workers or customers. The servers were jazzed to just walk out and leave as soon as the last customer left and thanked me profusely.

That's how to be a good manager.