Good thread topic, too bad Skip is no longer with us.
I've been putting a lot of thought into this myself, recently. I'm currently living in an apartment that I plan to stay in for only one year. Once that year is up, I plan to move somewhere a little more permanent, which I'll improve to my level of expectation.
For someone living in Vegas or in my case, close to the party district in Beijing, having a place that's good for pre-gaming and post-gaming is a winner. No matter where you live, a beer in a bar costs exceptionally more than the same beer in your own home.
Therefore, the ideal to shoot for, is a condo/apartment setup that is just as comfortable, if not more so, for you and your guests.
This allows you to the center of your social circle, rather on the outside. If your pad is a cheap and fun alternative to spending the entire night in pricy venues, hot women will come to you.
Here's some suggestions I've been playing with.
Pool/Dinner Table Combo
Unless you're a redneck and pool table is a useful place to conceive and deliver babies, generally investing in a pool table is a real waste of space, because you'll never end up using it that much. If you have the cash, however, a pool/dining room table combo is a fantastic thing to have.
The pool table will not waste space, as it easily disguised as a dining table, which has a daily functional purpose, but you can break out the pool table at any time when you are hosting guests or a full on party and want to bring the club/party vibe.
http://cuszoom.com/siennadining.php
http://www.cheshirebilliards.co.uk/oak_barley_twist.php
Hot Tub
If you can pull it off without having an apartment that smells of chemicals all day, every day, a hot tub would be a nice touch. There are few real ways to turn your apartment into a place where groups of women have a justifiable reason to get mostly naked. While I'd need some feed back from forum members on the effectiveness of hot tubs, this is a direction I've been thinking about. Of course, you need flooring that can handle the weight and an outdoor environment is preferable to indoor.
Showcase You
Find a way to showcase your talents or achievements in a way that isn't to try hard. In my case, having been playing guitar for 15 years, my ideal bachelor pad will have about six guitars displayed on the walls. No one is going to walk into my apartment without noticing them and when they ask about them, it's easy to pick one up and play something. Girls get wet panties for musicians.
In Skip's Steps case, he should have some framed photographs of him shaking hands with the President. Girls get wet panties for Obama.
Tweaks
1. Already mentioned above, but worth repeating. You do not want too much furniture, because it will give a girl too many options as to where she fits. You need a setup where the only conceivable place for her to park her ass is right next to yours on a couch that is just small enough to provoke incidental kino. This doesn't mean you can't have more than one couch, but you should only have one loveseat that offers a good view of the TV/general apartment.
2. Coffee table with game certified activities/books/photographs. This is discussed in depth elsewhere, but to summarize, when a woman sits down in the only place that it makes sense for her to sit down, she should be surrounded by artifacts that boost her perception of your value.
3. Don't draw too much attention to your bed, but don't ignore it either. The bed should be somewhere that women feel natural sitting, but it can't look too perfect or it'll rob her off plausible deniability.
4. Subtle sexual signals. You don't want porno mags on your coffee table, but tasteful references to sexual themes isn't a bad thing. I can't think of a good example, because Greek statues really aren't my cup of tea, but I'm going have to come up with something before I get my dream flat.