We used to play a League game every week with a £5 buy-in, with around 15 players paying out £75 in a prize pool for the top 3 players, When players went out they would start playing a cash game.
Winning the league game and getting the Lions share of the prize pool I sat down at the cash table buying in for £10 and only had around an hour before the Pub shut, I won another £145, not my biggest win but a decent night all the same.
My secret is I only drink Shandy when I play Poker, so I stay reasonable sober while the others are half drunk knocking back pints of beer all night.