Is it okay to play music while doing a Lemonade Stand?

Is it okay to play music while doing a Lemonade Stand?
It's OK to play music, but you need to be mindful of the local residents. They might be your parents, or it might be people working in offices, or it might just be people wanting to relax in the park.
As long as you don't turn it up loud and you are respectful of those around you, you will be fine.