I have to disagree with HajoFlyer. Most likely HajoFlyer refers to the times he had to share the WAW lounge with Party bosses getting drunk while waiting to fly back to Moscow. LOT significantly improved in recent years.

I know both WAW and AMS lounges and I've found the LOT lounge in WAW nice and quite acceptable. Friendly staff, good selection of drinks, a huge selection of cookies, candies and juices and a reasonable selection of international newspapers. However no showers and no views of the airport.

Amsterdam has windows providing an airport view over a roof, an acceptable selection of refreshments, more worn out furniture and no showers. At present LOT offers a better service than some lounges I've been in, and surely WAW is better than AMS.