They notice the way you treat others whom you don’t know. Men notice whether you have the same level of respect for everyone (taxi drivers, homeless people, etc.).
If you’re all generous towards waiters and then you behave completely different in front of taxi drivers, he’ll notice it. Men are really case sensitive when it comes to this.
They enjoy seeing women who treat everyone equally because these women know their worth and are not afraid to show their appreciation to everyone around them, regardless of their status.