What wicked activities do these people thrive on that Paul lists?
Paul lists envying, murders, drunkenness, and revelings as the wicked activities these people thrive on. Reveling implies they think they are having a good time, yet it invariably leads to misery, broken homes, broken health, and things that break them, because this lifestyle belongs to the old Adam and Satan's playground.
Les teaches that Paul is bringing out how these people thrive on wicked activities—the envying, the murders, the drunkenness, and the revelings. He explains that reveling implies they think they are having a good time, and for the moment perhaps they are. But it invariably leads to just the opposite: misery, broken homes, broken health, and anything that will break them. They continue in this lifestyle of the old Adam, which he calls the playground of Satan himself. Les also mentions alcoholism and the drug culture as part of the same broad pattern of degradation.
Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.