I have a glass desk blotter - both at home and the office. All my room key cards are underneath the glass. Fun to look at and remember each cruise/hotel room. Very few are generic - Hilton - Westin - Sheraton. They usually say the City or the actual property like Waldorf Astoria.

VOYAGER:
MC to FLL 11/07
MC/Dover 6/06
MARINER:
BCN / Ven 10/11
Alaska 2001|2006
Panama Canal 2003
NAV
Caribbean 11/06
Bermuda|New Eng/Canada 6/04
PG 5/05
OCEANIA
Nautica |Ist/Athens 6/07
Regatta|Baltics 6/08
Riviera 2013 Crossing -Istanbul to Miami