We cannot think too much. I have a similar situation like yours. My hubby always work late and need to go out 'entertain' his clients or socialize with his working partners. Everytime he comes back home very 'early' in the morning (next day) and got drunk. But since we had the baby he starts to change. He'll still go out but usually comes back before 1 or 2 am and will not get too drunk. I can only trust him. I also tried to leave him before (we lived together for many many years) but finally we know we love each other so we got married & have a baby now. Although he's not a standard good husband but now I trust he only has me as his woman. I can only give a warm family to him to make him stay home more la.....Sad? Depends on how to look at the matter law.
My hubby went to a nighclub once only. He needed to go with his nasty clients. On that night, they ordered some girls to sit with them. But my hubby said," We can drink but no need to touch me". After my hubby came back home, he described his experience to me. I belive him not doing wrong because I trust his honesty.
I fully understood your situation! I know your heart is not comfortable about your hubby going to the night club. But at least he told you about this. You know, there are many men going to the night club or going to SZ but their wifes don't know about this. When they are addicted to it, it is too late!!
If you are not feeling comfortable, try to express your feeling to your hubby. See what he will do. I think your sincerity can make him think about you before doing something wrong.
It's ture that good men are becoming less and less. There are so many temptations in the world!!