My first thoughts were, they are going to see a con-- as in "convict" or "ex-con" which could mean a lot of things. One thing I like about Bernie Sanders, except that I could not vote for him because of his views on termination of the unborn, is that he said that "Mass incarceration" will be over if he gets elected. He would release 2.2 million people, who don't belong there anyway, which would save $80 Billion which is in response to the failed war on drugs, which destroyed people's lives over sometimes minor offenses in the name of corrupt, legalistic justice. IT's a great thing that, as well as the end of "mass-incarceration," suffering people are being referred to treatment, which is where they belonged in the first place.
But, the world is still an insane place of erratic laws. Be aware at this bachelor party that drugs may be circulating. If people need drugs to have a good time, it's probably not a bachelor party you should be going to. Bachelor parties can be pretty silly, and can get a prospective groom into trouble through temptations. Your job as a Christian could be to protect the groom from craziness that could threaten his marriage.