If you do find things at the flea market/thrift store, you can fix them up together. I used a Go for a walk downtown together on a Friday or Saturday night. There's . Go on a very long walk around your neighborhood at night. 9. Spa night together . Tags: cheap birthday ideas · cheap date ideas · cheap fun things to do. Looking for unique, romantic date ideas for your next date night? not just what you do on the date, it's how you treat your significant other while you're on it.