the main hotels are in either Kings Cross - sleazy night life but interesting shops and places to eat and drink as well,.
darling harbour nice walkings - lots happening
the cbd - enough said
the beach's
coogee , bondi or brighton le sands
maybe double bay
manly or north sydney/milson point
homebush bay - or even parramatta , or even the Blue Mountains
google and if you have any questions - feel free to PM me