Have fun - now you just need to get a bike for your girlfriend.
Are you guys anywhere close to where you can access the train at the Burbank airport or a station in Hollywood to catch the Red Line and take into downtown LA? Or hop on another rail line at Union Station and go elsewhere - like the Gold Line to Pasadena. LA gets a bad "no mass transit" rap but you can actually get around some parts really well - especially compared to car traffic.