Uber is an on-demand private driver service offered in major cities around the United States including my two favorite cities, San Francisco and New York. Right now there is a special promotional code for a free $15 worth of credit for new users. (Sorry existing users!) On top of the promo code, if you use a referral link from an existing Uber user, you actually receive an additional $10 credit, making your grand total for free credits at $25. Whether you think one night you’ll be out late at night…… (click read more!)