No hot girl ever wanted to meet up, much less have sex, with you in the first place. All that's changed is now you scream into the void instead of forcing women to suffer your shrill, virginal incessant whining.
I can't find anything that says this. Some appear to be distance-based or charge for transfers [fucking stupid as that is], but the fares I've found are nowhere near $40/day.
Albeit, never been there so never taken that transit system.
At this point, I wouldn't worry about the co-worker. I'd just say you didn't know about the email until after it had been sent and you never wanted anything to do with it.
If the co-worker is actually a good friend he should understand that what he did unnecessarily got you into trouble. Then again, I don't think he would have included you in the first place if he were.