Doha International Airport (DIA) no longer has a passenger lounge to ask about, because it no longer handles scheduled passenger flights at all. Qatar moved its commercial passenger operations to the newly built Hamad International Airport (DOH) in 2014, and Doha International has since operated mainly for cargo, private aviation, and government and military flying rather than for travellers buying tickets on commercial airlines.
If you searched for a Doha airport lounge expecting to find it at this older facility, the honest correction is straightforward: any lounge question about Doha today is really a question about Hamad International, not about Doha International. Hamad opened as Qatar's new international gateway specifically to replace the older airport's passenger role, and it is the facility that now carries the country's lounge infrastructure, airline clubs, and contract spaces built for a major long-haul hub.
Hamad International's lounge picture reflects its role as a significant global connecting point. Premium-cabin passengers, elite frequent flyers, and holders of certain card-network memberships have real lounge options there, spread across a terminal built for a high volume of international transfers passing through the Gulf. The specific lounges, their exact locations, and their access rules are worth confirming directly through your airline or card program before you fly, since terminal layouts and eligibility details at a hub this size do get refined over time.
For anyone still encountering references to Doha International Airport in older travel guides or search results, treat that as historical rather than current: the passenger-facing airport for Doha and Qatar generally is Hamad International, and that is where any lounge planning, along with your actual flight, now belongs. Doha International's remaining activity sits outside the commercial passenger world entirely, so there is nothing to check there for a lounge visit, however old the listing you found might have looked.