Billed as the "World's Largest Gentlemen's Club," this place used to be an athletic club...and you can definitely tell!! It is cavernous (it was a 3-story gym) and impersonal, and you can't even see the stages from the corners of the room. There is one elevated stage up in the air, and one down on the floor. Both are smallish.
The place is usually jam-packed with girls of varying quality...usually pretty good, although as mentioned in other reviews they can be pretty pushy -- they HAVE to be, with that many other girls around competing for business!
Pros: cigar-friendly (they have a well-stocked cigar bar), free limo service from your hotel (so you don't have to pay the cabbie surcharge to get in), TONS of parking if you do drive yourself, convenient location (right behind Circus Circus and right next to a 24 hour massage parlor).
Cons: Too big, impersonal, crowded, feels like you're in a gym with the lights out.
There is also a male revue in an adjoining room, for those so inclined. The Men of Sapphire perform Fridays and Saturdays only, and I can speak from experience that they are smoking hot.
Bonus: if you are coming to town for a convention, and your company's booth needs booth babes to stand around and lure in clients... Sapphire will provide you with models FREE of charge! The quality isn't that good (what looks good in a darkened titty bar doesn't always look so good under the harsh fluorescent lights of the convention center)...but it's free, and they also give you and your colleagues a free ride back to Sapphire at the end of the day, so you can party (and they can make their money back).
Recommended for its convenient location and free shuttle...this is a good place for bachelor parties who don't mind spending money.

Very very very pushy strippers, I was turned off to any further dances when one girl forced a dance on me then called the bouncer.