dnd parties meeting up in a tavern gets a lot funnier when you consider that even by the standards of the world a group that consists of multiple fantasy races, some of whom are wearing fancy armor and robes and/or openly carrying magical items and weapons, all showing up at roughly the same time and taking a table together probably isn't a regular or expected occurrence
all the other patrons in the tavern when the dnd party which consists of a 7ft tall orc, a hot pink tiefling, a halfling warrior, a human wearing magical glowing armor, a sinister looking hooded figure, an aasimar and a half-elf bard walk in
you can solve this plothole by making adventuring a common thing in the world and its not unusual for plucky and edgy young adults to go to a tavern to escape their troubles either through drink or quest