Which cities do you believe offer the best in terms of customer service at restaurants, bars, and clubs as well as amenities? Amenities include accessible gyms, pools, shopping malls, movie theatres, and transportation/food delivery through apps like uber (or local equivalent).
I think the “World Cities” classification is pretty accurate in that regard:
The top cities from the list may not offer the best “value for money”, but you asked for simply “the best” 
If you want the best “value for money” it makes sense to focus on a specific region, and compare major cities there for things you’re interested in.