Pubs can also refer to online servers without passwords as well.
Player 2: I guess.
Pub 1: HEY GUIZE U RDY 2 PLAY SUM L4D? U DONT MIND IF I USE MY MIC RITE???
2. (noun) A noob online playing not affiliated with any clans, groups or associations.
3. (adj) A public game or room on an online game.
Kryten : "What is this place?"
Rimmer: "Its a 'pub'."
Kryten : "'Pub'? Ah yes, A meeting place where humans attempt to achieve advanced states of mental incompetence, by the repeated consumption of fermented vegetable drinks."