Michel's Colony Surf.
Michel's at the Colony Surf is a restaurant, and a location used as a filming location in:
- "Orientation" as the restaurant where Locke accepted the key to Helen's apartment. 
- "S.O.S." as the restaurant at Niagara Falls where Rose reveals her terminal illness to Bernard. 
Michel's is located in Honolulu at 2895 Kalakaua Ave. Niagara Falls were added with a bluescreen on the windows. No restaurant actually exists at Niagara Falls at the location as indicated by the view. (Ref: 1, 2, 3)
- Hawaii123 Japanese website which has an indoor photo you can compare with the above link.
- Michel's Hawaii official site
- Lost Virtual Tour - page on Michel's
- Google Maps