Aww look Pepito is being nice.

Run!
But seriously. Thanks for getting the answers started Dannae.

To elaborate a bit further:
1. The Den is a venue, not a place for the weary traveler to kick off his shoes and settle in for the night. True there will be things in common with the taverns such as getting a drink, socializing and a bar fight or two like at Brados, but it's a little bit more upscale than just a tavern... A little...
Also the atmosphere will be much different. The Den is suppose to be a place of entertainment not just home away from home, so we hope to have attractions(events) that showcases various entertainment (no mud wrestling fenkis, you know you aren't going to clean the mess later.

). Ideally it would showcase player talents like singers, but that will require the community to step up.
Another small feature is that the Den offers custom liquor, unique to the Den, now. We don't wait for the new model releases.

(but it's still in the realm of what settings could add) And over time I'll have Tel expand the liquor selection. I'd love to offer mixed drinks as well, but we might have to reach out to other players for that.

There will be a certain standard of RP maintained. This is not to say we will be strict RP disciplinarians but certain RPs will not be allowed. Not to mention we will work to keep /me throws a pie in your face (even though there are no pies around) down. As it stands right now, if there is an RP that is inappropriate or off settings, we use a kind OOC correction to help, instead of just saying the person is wrong. Yelling [Stupid Noob that doesn't exist!] is just as inappropriate and also will not be tolerated. As for OOC pains, if necessary a GM will be called to remove them... Running around the Den spouting gibberish from mashing every key will not be tolerated.
The Den will be a safe place for all people to RP but there are standards, like being settings compliant, that must be maintained. So far the bulk of the Den's customers have been able to abide by these rules and others have since come to follow them, so I figure none of this is too burdensome. If anyone has doubts about whether or not they can stand by this, they should come by the den and see for themselves. They won't get run out or anything and if they don't like it they can leave right back out at anytime, no harm no foul.
2/3. Ideally we'd have the Den unlocked all the time but that might take some extra mechanics to make work... *cough* Like Containers that only allow you to take out the items you put into it. *cough*

As Dannae has said, we've had that problem several times actually. However, once there is no chance of loosing expensive items (yes mugs are expensive :S and it would be appreciated if people returned them once they are finished with their drinks) then we would like to have it open all the time.
For now though, there needs only be a bartender on duty to have the place open.