I hope that's somebody's living quarters in the photo, and not their office! I've worked at a couple of offices that felt tightly packed, but they were nothing by comparison to that ;)

As a long-term proposition, I'd say that table is suitable for no more than 3. (Not sure what official guidelines are, but I'd say you'd need around 150cm x 75cm, or 5' x 2'6", per person. That gives you enough room for keyboard-laptop-monitor depthwise, and two monitors-plus-space widthwise. But the more the merrier, of course... humans are social, but not THAT social.)