He has claimed his booth for all studentkind: namely, himself. He won't ever admit having concerns about juggling the Dark Hour and school, but if you could read his mind you'd find he's happy to have found this place and its time-bending ways. Now he can do pretty much whatever he wants to do outside the bar and leave the homework for...
...later. Much later. He tried studying, he really did. It's just the book he studied out of is criminally dry, and he's now wandering about outside, looking for a distraction.