Let's break it down:
$150.00 for 7 days comes to $21.43 per day.
Tips cover room steward, waiter and assistant waiter.
Divide your $21.43 per day by 3 and you have now tipped each service person $7.14 cents per day. (that is for both $3.57 per day each)
The service you received each day is having your room cleaned several times a day, you are catered to for dinner and if you eat lunch or breakfast in the dining room you are served as well. If you eat three meals a day in the dining room you are tipping $2.38 each meal when the dinner alone should be more than $7.14. When I stay at a hotel I at least leave the maid $10.00 per day.
Kindness comes back to you, maybe not from the person you blessed but it does come back to you.