In its first adjustment in 13 years, Royal Caribbean is recommending that guests leave larger tips, starting July 1. The line recommends $11.65 per person per day in gratuities for dining and housekeeping staffs ($13.90 for suite guests), up from $9.75. The breakdown: Waiter $3.75, assistant waiter $2.15, head waiter 75 cents, housekeeping staff, $5, suite housekeeping $7.25.