It's somewhere you go to wait for your next flight in relative silence, except for the people in said suits who often like to conduct "business" loudly on their phones...
"Hi, it's John. I'm in the Business Lounge. Let's do some Business. So how many photocopiers can we sell today?"
I tend to sit there quietly and get **** faced on free booze

not that I get to use them very often
while they are nowhere near as good the pay lounges at airports tend to work out good value if are partial to a few before your flight