a man about town的用法和样例：
- He was known as a man about town.
- Arsenio has a reputation for being a man about town .
- I should describe him as a man about town; he has enough money to be able to live without a profession and he doesn't seem to want one.
- A man about town.
- He was a man quite unknown about town.
- I understand him to be a man about fifty.