In your typical "big Asian city", you have night markets, restaurants, shopping areas, etc. that all "come alive", so to speak, at night. Young, old, families, etc. are all welcome and expected. Yes, there are bars, of course, but they aren't the sole focus of "nightlife."
In the US the only things open at night seem to be bars that cater to single adults, and anyone who wants to do anything but social drinking in crowded bars have few options.