Controlling noise in adjoined spaces, typical in shared commercial/retail spaces

Another post by a visitor that will be sure to help anyone in shared commercial spaces with noise coming in from adjoined spaces which is a typical situation found in commercial and retail spaces
We are a massage therapy business and need to block the noise coming through the walls and across the drop ceiling from the business next door, which has loud screaming children and music.
Which would be the most effective way to block the noise, on their side of the wall or on our walls? Both sides of ceilings?
We need absoulte quiet for our business.
Any suggestions would be most appreciated!?
Thank you,?

Controlling noise from adjoined spaces in typical

Another post by a visitor that will be sure to help anyone in shared commercial spaces with noise coming in from adjoined spaces which is a typical situation found in shared commercial and retail spaces
We are a massage therapy business and need to block the noise coming through the walls and across the drop ceiling from the business next door, which has loud screaming children and music.
Which would be the most effective way to block the noise, on their side of the wall or on our walls? Both sides of ceilings?
We need absoulte quiet for our business.
Any suggestions would be most appreciated!?
Thank you,?