Is Julie Star's story
Time Enough For Tears what you were thinking of? Lucy isn't in the bar, but Lois most certainly does get drunk, and Clark does his bit to rescue her...
The theme seems similar to what you are after, anyway... This one isn't nfic.
If nothing else, this story has one of my all time favourite lines in it:
She was clearly still in a good mood. "Oh, Clark, don't be such a grumpy-pants."
Chris
Edited to add: Schnuffichen got in first... AND gave the right answer! Oh, well...