lobby

(noun) a large entrance or reception room or area. Synonyms: anteroom, antechamber, entrance hall, hall, foyer, vestibule.

(noun) the people who support some common cause or business or principle or sectional interest.

(noun) a group of people who try actively to influence legislation. Synonyms: pressure group, third house.

(verb) detain in conversation by or as if by holding on to the outer garments of; as for political or economic favors. Synonyms: buttonhole.