What's a responsible, DUI-averting drunkard to do at 2 a.m., when repeat calls to Metro Taxi and Yellow Cab yield nothing but busy signals? Rather than join the drunken masses attempting to hail a cab from the sidewalk, try Freedom Cab. Freedom's understated lavender taxis aren't as fast or as flashy as those that boast the 3s and 7s. But the dispatchers usually answer on the first or second ring, and drivers tend to show up within ten minutes, even on busy Saturday nights. It's the best call at last call.