Before my TAP Portugal flight to Chicago, I stopped at the TAP lounge briefly prior to boarding. The lounge is located on the mezzanine floor above the main terminal, and it shares a floor with the “ANA” lounge, a contract lounge that is also accessible to Priority Pass members.
The lounge was crowded and there were very few empty seats, but I managed to find one just in front of the bar area. The buffet offering was adequate, showcasing local cheese and pastries, but not very many selections of hot items.
There is a wine dispenser on the buffet side with a few bottles of Portuguese wine selection, but one can also get one poured by the bartender at the bar. The spirit choices were decent and the drink of the month, a sangria of sort, was quite nice.
Bear in mind that the lounge is located before passport control. Those flying to destinations outside of the Schengen zone must clear passport control prior to boarding their flights. Citizens of certain countries, including the United States, are able to use the automated passport gates at LIS. However, this was not available during the time I was there. Luckily there was only minimal queue at the regular desk.