One of the good things about Knowhere was the artificial sun. Sure, it made Eric a little sleepy sometimes, but at least he didn't bleed from every orifice when he held off going to sleep for the day. Plus, he didn't burst into flames when he stepped into direct sunlight, so he tended to be awake more often than not, and usually could be found at Death & Taxes.
Typically, Eric would rather have staff do the physical labor while he oversaw things, but he learned very quickly the best way to know what was going on board Knowhere was to be in the thick of it, which was why he was behind the bar on the ground floor, cleaning glasses while he listened to the patrons.