I have a three hour stopover in Warsaw - assuming that my flight arrives on time - is there anything that I coudl do in my stopover other than hangout at the airport?

I will be travelling business class (LOT) so will have access to a business lounge - if that makes any difference.

Three hours is not a lot of time...

Warsaw airport is not big and it tends to get overcrowded at times (construction of a new terminal is under way)... You might end up spending up to an hours queing for immigration and security control... plus a taxi to central Warsaw could take as little as 15 minutes or as much as 45 minutes depending on the traffic.

Save yourself the hassle and use one of the lounges (there are three)...

Be prepared your stopover may be longer. We recently got an extra 10 hours in Paris! Is your baggage checked thru? How much cabin baggage? Airporter or local bus can take you into central Warszawa. An Airporter every 20 minutes. You can reboard it to return to airport.

I agree with "higher" with all exit/enternace (and really there is no quick exit/enter) and even a taxi ride unless you just drive thru (and probably fairly fast), you taking a good chance of not making your flight, or at least be very nervous that you will. As for flight delays ... you can't really compare Paris (one of the major hubs) to Warsaw airport...

How about hiring a taxi for a couple of hours. Many sites are easily available for short stops. The new Warsaw Uprising Memorial could be a first destination!