Man those are some wise words. My parents owned a couple of night clubs in the 80s and early 90s, and there was a dangerous energy about when things were about to go down. One of our bouncers was murdered on just such a night; my parents got out of the business not long after that. Tips I followed when would go out:
1. Avoid nights with a full moon. Any police officer will tell you that the number of incidents really do escalate under a full moon.
2. Rarely does anything good happen after midnight.