Do not be deceived: "Evil company corrupts good habits." (1 Corinthians 15:33; NKJV)
The context of this verse is profound. There were some Christians at Corinth that were saying "that there is no resurrection from the dead" (1 Corinthians 15:12). The point of 1 Corinthians 15:33 in context is this: If you associate with folks who do not believe in the resurrection they will corrupt you.
"Awake to righteousness and do not sin; for some do not the knowledge of God. I speak this to your shame" (1 Corinthians 15:34; NKJV).