London buses: £1.00 a journey, single bus anywhere within Greater London Area.
Daily bus pass, anywhere ya like, any bus, as many journeys as you like: £2.50
Weekly Bus Pass, same conditions as daily bus pass - £9.50
Not bad really, though it's quicker by train...
As I usually only ever use buses to get back from the pub (I often walk there, along the riverfront, unless it's raining) I just pay a quid per journey.
A cab, btw, from pub to chez flops, costs about six quid.