If anyone knows about these little finer points of life it would be me. That being said, if anyone should warn you about these pitfalls it should be me.
I don't know what your police culture calls this late night cop fellowship. Some used to refer to it as choir practice, hot suppers, midnight court, and so forth. One thing is real here: There are consequences for your actions, and the reason I am throwing water in punch is that I have seen good cops' careers messed up over foolishness. Have a sober driver or cool head to keep you off the crazy train.
Go ahead and have a good time, but recall that cops do bring with them guns, edged weapons, and egos…this can be a volatile mix. Again, cool heads need to prevail here and old hats need to offer their sage advice. Designate a "safety officer" who can act as the bouncer or keep egos in check. Set ground rules for the fellowship; hey, it is your party and your career.
No, I am not a prude and, yes, I have been to my share of parties. But the last people you want showing up to your soiree are other police trying to quell it. Once that happens damage control is required, and later internal affairs is in your business. Think and be responsible. Do not put your brother and sister officers in a quandary about covering up for you due to your off-duty antics.
Don't make your supervisors lie for you either; it never works out. Calling the spouse or significant other and saying you are working overtime on midnights is one thing. But, then hitting the bricks to the club, or who knows where, is an invitation to disaster. Sooner or later, your spouse will notice there is no overtime on your check for the night you supposedly spent working, or they worry and call in asking where you are. Get it?