What does the word "frugal" mean?
A frugal person is someone who is not wasteful, very careful about money, and make decisions based on economic gain or loss. Being frugal means to spend money the best way it can be spent.
A frugal date therefore means an economical date, not spending hundreds of dollars on a 4-course meal but being smart about how to spend the money the "best" way possible (maybe you can save that money used on one date to use on several frugal dates).
Are you a frugal person? Would you rather sacrifice now by saving and then enjoy it in the future? Or would you rather just enjoy everything now and worry about the future when it comes?