Invite the neighbors on every side of you ( including ceiling and floor ) to the parties. Be aware of your noise levels. Once you are friends with some of your neighbors ask them if you can test your stereo settings to see how much your stereo can be heard in their place. If you or your guests smoke anything learn how much smoke from your place makes it to their place. Learn if they can hear your footsteps. Put down rugs and mats to blunt the noise and vibrations.