This is indeed a problem that needs to be sorted out quickly and effectively. Is the accommodation provided free of cost, subsidized, or at full market rent? Also, what is the basis of providing the accommodation?
If the accommodation is provided at full market rent, then they are to be considered as "in their OWN home" and are free to do as they wish as long as their activities are legal. Your response is, therefore, limited to issuing warning letters, stating that unless their behavior improves, with immediate effect they are in danger of losing their jobs on the grounds of bringing the company into disrepute.
If the accommodation is rent-free or subsidized, then you have some responsibility to ensure that their behavior does not cause embarrassment to the company and is respectful towards neighbors.
This can be achieved in the first place by having a robust policy, clearly stating the expected standards and if breached the consequences; such as disciplinary actions which may lead to dismissal on the grounds of bringing the company into disrepute. I suggest you use this opportunity to set out the state of repair, maintenance, and cleanliness in and around the accommodation.
If you have such a policy already, then you need to enforce it. If not, then you need to draw one up and issue two copies to every person concerned; one for them to sign and return, the other for their records.
I hope the above helps.
Regards,
Harsh