In reply to Kemics:
It's a civil matter, which means you really want somebody to be taking it on for you, ideally an insurance company. Failing that, a solicitor such as can be seen in pretty much every ad break on daytime TV (ie one that doesn't cost you anything out of pocket).
The problem is that in the cold light of day, the passenger will remember that you were a pedalling maniac, probably high on smack and riding without lights. So you need to report it to the police fairly sharpish, and if you have a proper diagnosis of your injuries, that'd help enormously. Make sure you report both individuals and mention that the driver refused to give her details - this is an offence under the Road Traffic Act. It also puts her on the back foot and makes her more likely to ensure that Party Boy coughs up.
Never, ever sue poor people. The passenger won't have any liability insurance, but the driver will. The driver was responsible for the position of the car and for depositing an obviously inebriated passenger into a cycle lane. As she was in the driving seat, she owed you a duty of care both to be aware of you and to ensure that you weren't put at risk of injury. She failed on both counts.
If you want reimbursement of costs, reporting to the police and a reasonable letter to the passenger will probably suffice; if it's compensation for injury-related financial loss and suffering, it'll definitely be a court job.