Quest 31

Welcome To The Adventurer's Tavern is a quest which can be accepted at any bar by talking to the NPC behind the counter wearing a suit. You need to travel to Rakkalan (ラッカラン) and enter the lamp shop to buy Birdsong Nectar (さえずりのみつ) for 210 gold which can be found on the map as a lamp icon. Return to the bar and present the Birdsong Nectar to them and the quest will be cleared.

Completing the quest gives a reward of a Gleeban Gold Piece (ウルベア金貨）and access to recruit and be recruited by other players as well as 1920 experience and 17 fame.