Double booked!

Invariably it was going to occur sooner or later, I've been double booked for tomorrow night and I can't decline either of the events. Its actually two events that occur one right after the other on opposite sides of the city, one a farewell and the other a birthday. Compounding the problem is that I won't have access to a car, so will need to depend on public transport to get from the office to the first event (no problems), first event to the second event (not much of a problem) and from the second event home (much of a problem). Will be getting my ticket's worth of travel tomorrow!