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While it might be possible, it would be a terrible thing to do. These daily service charges are how the hard working crew receive their pay! It is not the type of tip that is only awarded to those who have provided outstanding service, but it is more of a service charge for basic expected service. You can always hand out a little extra cash at the end of the cruise to any crew that went above and beyond and made your cruise special. On most lines when people do skimp out of the daily service charge, any cash they hand to crew members must be turned in by those crew members to be pooled and distributed by the cruise line.
Celebrity Xpedition - October 5, 2014 - Galapagos (Seals, Penguins and Boobies, Oh My)!
RCI Allure of the Seas - September 2, 2012 - Eastern Caribbean (Aft Boardwalk Balcony; 24 Restaurants in 7 Days)!
Celebrity Millennium - May 27, 2012 - Pacific Coastal Wine Cruise with Temecula, San Diego, and Vancouver Land Add On (Sky Suite GTY)
Celebrity Millennium - February 20, 2012 - Western Caribbean (Adult Spring Break: SoBe, Millie & The Penthouse)
Celebrity Silhouette - September 27, 2011 - Holy Land (Concierge Class)
Celebrity Equinox - October 31, 2010 - Mediterranean & Westbound Transatlantic with the Hobgoblins (First Suite)
Celebrity Equinox - December 4, 2009 - Southern Caribbean (Aqua Class "Hump" Stateroom)
RCI Jewel of the Seas - January 9, 2009 - Panama Canal Cruise with the Panamaniacs!
Celebrity Century - April 28, 2008 - Transatlantic: Miami to Amsterdam Honeymoon Cruise with the Centurions!
HAL Noordam - May 13, 2007 - Alaska Inside Passage
RCI Adventure of the Seas - November 26, 2006 - Eastern Caribbean
RCI Grandeur of the Seas - February 11, 2006 - Western Caribbean
RCI Enchantment of the Seas - January 8, 2005 - Western Caribbean