The Bar/Lounge at Pariwana Hostel Lima
The bar/lounge at Pariwana Hostel Lima is endorsed by professional reviewers. Of the 2 reviews tracked on TripExpert, 2 mentioned the bar/lounge, such as Frommer's and DK Eyewitness.
Pariwana Hostel Lima 
Frommer's
DK Eyewitness
Frommer's "And there's plenty of the latter, with lots of group activities, a bar/restaurant, games, breakfast until 1pm and more"
DK Eyewitness "Run by the team from the ever popular Loki in Cusco (see p274), this super convivial hostal opposite Parque Kennedy
has an expansive, sun-filled rooftop terrace, dorms, and private rooms with top-notch bathrooms, TV room,
free Internet, and a restaurant/bar in which a nightly get-to-know-you dinner is held"
