And yes, bars also have soundproofing.
Soundproofing is the most effective method of reducing noice at indoor buildings being it a music studio, bar, lounge or even a residential house. But it won't work for outdoor buildings or places where the entire place is outdoor. You can't trap the noice there hence the reason why government regulations also need to be effective so that there's a limit to which a place within the neighborhood can cause noise pollution, so that people won't be affected by the disturbances caused by the culprit. This is mostly the case for my country that's why cars honk anyhow they like and public open spaces end up causing noise distractions and pollution.
People don't know that diseases such as increased heart rate or blood pressure can be triggered by noise stress. Some individuals also suffer insomnia because they cannot sleep where there is excess noise while for some it even end up as fatigue due to difficulties in falling asleep. I personally become easily stressed out and irritated the moment I get exposed to excessive noise distractions and it immediately disrupts my level of concentration to work or learning.
In most severe conditions, noise pollution can result in cardiovascular issues like stroke or hypertension, hearing loss where it causes damages in the eardrums. One aspect many people do not consider is the effects on children, you will come across parents who irresponsibly engage in house parties virtually every weekends allowing the kids exposure to loud speakers all the time. This practice can end up in negatively impacting on the child's academic performance or language development.