Serious answer to the tube question is that it would proportionally cost more than it would be worth in revenues. Also there is a need to have a period without electricity in the tunnels to enable maintenance and cleaning to take place.
In my experience, with the exception of New Year's Eve, very few people actually travel about London between midnight and 5am. Wife and I have often been the only people on the night service bus from Trafalgar Square to North Finchley.
Sorry to hear of the hangover ~ perhaps you too are getting too old for such revels?