I posted a question about cabs and this is more general.
I have an event at the O2 Arena. There is a party after this event (also at the arena) that runs until 1:00 AM. There will be a large crowd.
By this time the Jubilee line is closed, and I've heard horror stories about there not being enough cabs out on the peninsula.
I don't know if the Thames clippers will run after the 1 am party.