G'day,
I'll be dropping by Brussels for 1 day and I am hoping to get some suggestions on what I should see in one day. I arrive at 9:00 am and depart at 9 PM

What is the best way to get to the city?
What is the Star Alliance Business lounge like?
What should I see (I am the quiet, non museum but I like to walk sort of bloke)

Any ideas would be appreciated.
Thank you in advance,

Dave.