Clint DeBoer said:
Don't be afraid to involve a local installer in the process as it could be well worth the money and save you headaches in the future.
It sounds like you are talking about a retail/showroom for business use (even if a fun business
). First and foremost, hire a professional to hang anything that goes overhead. There are both proper and extremely dangerous ways to hang heavy objects overhead, and you don't want to be liable for them dropping on a showpeice or a person! Many nightclubs and churches are good examples of VERY dangerous rigging practices.
One question is if you have any sort of budget constraints in mind? If you work on custom cars & bikes, building a subwoofer might be right up your alley. If you want to search out the LAB Sub project on ProSound Web's Live Audio Board, you will find somewhat complicated, but doable plans for a subwoofer that you simply won't beat without spending a good bit more. Two of these placed properly or even one in a corner will probably be enough to piss off the neighboors, even if you have cinder block walls. You could even build them into the platform for the stripper pole.
With the speakers, the JBL Eon and maybe the powered Mackie stuff isn't bad, but if you can find a place to buy them, I would check out the Yorkville U15 Unity products, and maybe even the matching horn subwoofer if you want to purchase a sub that's ready to go.
The layout will dictate how many speakers you need, and there are reasons and strengths to goign with 2-6 speakers or 6-12 as Clint suggests, although I wouldn't think of not including a subwoofer based on your description. While I doubt budget will allow, if you can splurge for a Danley Sound Labs TH-115, one would probably do nicely with a decent amp driving it (>1,000W).
Note that some speakers are much more directional than others (for example the U15s) which can be very helpful, depending on your intention. You might want to have one area that is where the sound primarily radiates from or is anchored, or you might just want a more even sound distributed around with smaller speakers and a robust subwoofer.