aficionado
attender
audience
buff
caller
company
denizen
fan
freeloader
gate-crasher
guest
habitue
habitué
haunter
moocher
patron
resorter
spectator
theatergoer
uninvited guest
visitant
visitor
client
customer
fixture
operagoer
regular
corruptio
fac
frequenting
nequitia
probatis
suscipit
violentiam