What cruiseline? $10 per person, per day, is standard on most ships, regardless of if you use the dining room or not. The tips are pooled between all the wait staff (dining room and lido) and room staff (stewards and assistants). On some cruise lines, tips will be on your sail and sign account. The only other tips would be $1 or $2 when you order room service (yes, room service is free, but it is customary to tip), $1 per bag to the porter (at the dock), and any tips for taxis or tour operators. If you order non-alcoholic beverages (you said you don't drink), 15% will automatically be added to the bill on your sail and sign account.