[SecurityMinded]

At 50 or thereabouts, people's priorities in life changes and they change away from partying. The reasons you have listed are all valid points, but there is nit much you can do, other than befriending a younger generation, who tend to party a lot more than people in your (and mine) age group. But then, you are looking into being called the "geezer" in the group. Accept your new status quo. Be happy with the few parties you attend or host. That is my best advice. Yesteryears are not making a comeback.