Run by the friendly and mysterious Guinan. Atmosphere is relaxed, usually spacious, and relatively quiet. Activities include chess and other board games and live music recitals. Drinks, food, and everything are free.
Quark’s Bar on DS9
Run by the somewhat shady businessman Quark. Atmosphere is loud, usually crowded, and rowdy. Activities include gambling games and betting pools. Drinks, food, and everything you have to pay for.
*Not including the holosuites as a feature of Quark’s, since the Enterprise also has that. Which bar/lounge would you choose?