Big Brother
aficionado
arrival
attender
audience
auditor
boatswain
boss
buff
caller
chief
comer
company
comptroller
controller
entrant
examinant
examiner
fan
floor manager
floorman
floorwalker
foreman
freeloader
frequenter
gaffer
ganger
gate-crasher
guest
guests
habitue
haunter
head
headman
immigrant
in-migrant
incomer
inspector
intruder
investigator
monitor
moocher
newcomer
noncommissioned officer
observer
overman
overseer
visit
visitation
traveler
traveller
boulevardier
invitee
visiting fireman
citizen
customer
folk
friend
gentleman
member
one
passenger
reader
servant
stranger
student
tourist
inquisitor