24-hour Diners:   Zippy's (various locations all over); Likelike Drive-Inn (Keeaumoku Street across Wal-Mart); Denny's American Restaurant (Imperial Hotel on Lewers Street & Miramar Hotel on Kuhio Avenue);  Anna Miller out Pearlridge Shopping Center and Mac 24/7 (see below);  

local kine grinds:    Eggs n Things (Waikiki - 11 pm  to 2 pm) - breakfast and such;  Anna Miller (Pearlridge) - great breakfast and pie and more;  Mac 24/7 (Waikiki at Hilton Prince Kuhio Hotel) - rich, delicious food, and fancy drinks, also breakfast and coffee, but a pit pricey 24-hour other:   Sorabol (across street to Walmart-Keeaumoku St) - Korean; entrees come with rice, seaweed soup, and assortment of veggies; great meats, soups and stews (not extreme spicy) now 24 hrsShokudo (1585 Kapiolani Ave. next to Nordstrom's, open until 2 am.) - Japanese/Pacific cuisine, tasty but a bit pricey; good alcoholic drinks as well but don't order dessert;  Mr. Oji-san (Kapahulu - open until midnight) - Japanese, also a bit pricey but worthwhile quality and taste;  Sansei (Marriott Waikiki Beach Hotel) - sushi, sashimi, must have crab ramen, late night pupu and sushi menu from 10 pm to 1 am on Fridays & Saturdays); Ice Cream: Bubbies (University Ave.) - plus coffee and ice cream desserts, biscotti and cookies.

 Note on Clubs and Bars: many such places are focused on serving alcohol, so the kitchen closes around 10pm. No late night list is complete without the Wailana Coffee Shop. It is located on Ala Moana, accross from Hilton Hawaiian Village. The dinner specials are good value and the 24 hr breakfasts are a favorite- try the all-you-can-eat pancakes.  

 Add to list:  Fook Yuen Chinese Seafood Restaurant, McCully Shopping Center - open to early morning 3 amCompadres Bar & Grill, Ward Centre, late night pupu menu until midnight daily (Mexican);  Indigo Eurasian Cuisine, 1121 Nuuanu Avenue,  Bar Menu until 12 midnight; Mortan's The Steakhouse, Ala Moana Shopping Center, serving dinner until 11 pm daily;  Singha Thai Cuisine, 1910 Ala Moana Blvd. across Hilton Hawaiian Village, below Today Restaurant, serving Thai cuisine until 11 pm;  Ramen Ezogiku, varuious location, serving ramen until 12 midnight; Liliha Bakery and Coffee Shop, 515 N. Kuakini Street, Lihiha, a 24 hour bakery and diner, a rare find;