Home insurance and safety mesure for you pool party

What a nice afternoon you and your family will have next Saturday relaxing around the pool. Yes, but maybe you have to do special stuff to protect yourself regarding your home insurance since 30 people will be at your house for that party. A pool is pretty nice, I really enjoy mine and I am sure you do with yours, but a safe afternoon should be guarateed for you and your "convives" How to do it , first of all if you think that people will drink alcohol keep a eye of them because you are responsibible for them at the party in case they hurt themselves plus you are in charge of them even on the road if they go back home and have a car accident due to their alcohol consuption.