We’d find this story a strain to believe if Lindsay Lohan weren’t its subject. A source who was at the Original Penguin store opening on Melrose last Thursday tells us that she was surprised to see Lohan hiding, crouched, below the bar, trying to get the attention of the bartender. “I’ll have one of those,” she whispered loudly when he noticed her. The girl who was pictured wearing a 90-day sobriety chip the other day pointed to the vodka soda he was making for another guest. “But put it in one of those,” she hissed, indicating a bottle of smartwater.