Aussie_Dave--I don't know who hipped you to our fun fest here but they did you a solid--you owe them. Now for the particulars of your situation, I gather your "activities" are going to be nocturnal. A good choice to keep your lives separate would be to "Search" Short-Time Motels (Eden, La Oficina, Asia etc) like the Brothers said. Not at all grubby (I believe Chicas won't balk at all being taken there). If you had time daytime I'd suggest MPs.
BTW how about some time or another how about a brief overview of Mongering in Australia? Options, venues, prices, selections available, Websites--that sort of thing. We give, we get here.
Also BTW I don't see a benefit this time (corporate atmosphere and all that) but if you come back on your own--consider paid membership here. Guaranteed to enhance your experience if only from the serious discounts available, the Monger Map, entree to members-only Forums and may I say, the feeling of belonging.
Oh Yeah about Jaco--not a lot of choices but get a cheap room and pick'm up at the Beatle Bar. Here's a choice hotel:
http://www.bphotel.com