"...we KNOW we are going to spend money and know we are not diciplined enough to stay home every weekend and not spend money...."
Sure. You are enjoying one of the BENEFITS of having been responsible with your money in the past. Your bills are paid on time, you are saving for the future, giving to charity, and you have discretionary income.
Who cares if you "blow" it (within reason) on restaurant dinners or movies? I sure don't. I do the same.
Stick with the plan. When you get to be my age you can do really great fun stuff like travel. I go to Europe every year. I'm now enjoying the BENEFITS of past responsibility with money.