Actually, the PC lounge hours aren't continuous. The following are their hours: 5:30am-7:00am M/W/F closed from 7:00am - 10:00am M/W/F, reopen from 11:00am - 10:00pm M/W/F T/Thur/Fri/Sat/Sun - 11:00am - 11:00pm

Still, CO's lounge is probably the best of the SkyTeam carriers in HNL. CO puts out a nice spread of full bag of chips, fresh fruits and has an open bar in their HNL location. A big perk is that the lounge also has its own restroom (not to forget the WiFi).

NW's lounge has an assortment of cookies and crackers and an open bar--though CO's is more extensive. Also, WiFi, but no bathroom located in the club itself (bathrooms are right outside the club).

DL's lounge offers only their snack bowl and also has an open bar. No free WiFi however--only offered is that shoddy paid T-Mobile WiFi service.

However, in all my transits through these lounges, no staff has out competed the other. Each club's staff is extremely pleasant, knows their rules real well and is grateful for your patronage, especially if you're a member of their club.

Location-wise... it all depends on your gate. You could be stuck out at Gate 25 (departing on a Continental aircraft) and be pretty far from all three clubs (the CO & NW clubs are located across from Gate 12/13 and the DL club located in the garden courtyard). Or, you could be departing out of gates 12/13 (mostly NW operated gates--though ALL gates in HNL are considered unassigned) and be right across from the NW & CO clubs.

The garden area is also a nice place to relax in tranquility. Here are some pictures of the area (that I ask not be reproduced in any shape or form):
http://slippahs.smugmug.com/gallery/733724
http://slippahs.smugmug.com/gallery/733724/1/24382815
http://slippahs.smugmug.com/gallery/733724/1/32269543