Mu.
Your question is flawed.
Zooming the PC-camera in for a conversation with the bartender is not the end-all and be-all of roleplaying. In fact, if you're insisting that he say it how he'd say it, it's likely that you're forcing a average-charisma PLAYER with a high-charisma PC to act out something that is not as good as his character could do.
Equally valid interpretations of Hardcore Roleplaying include:
- Willing to walk into an ambush cheerfully, leaving his armor back at the inn, even when the player knows full well that it's an ambush because the party split up and the other PCs got captured and the bad guys bragged to them about how they were going to ambush the last guy. All of this happened in the open at the table, and the player heard it, but is roleplaying his character as being blithely ignorant.
- Willing to disagree with the party over something that is not ordinarily disagreed-with for game-easing purposes -- eg, playing a paladin of a merciful god who argues strenuously against killing evil prisoners that might be redeemable.
- Willing to try a combat maneuver that isn't in the book, trusting that he and the DM will agree on a reasonable and not-overpowered mechanic for it.
- Willing to run away if the party seems to be losing.
- Willing to refuse to use the equipment of slain enemies.
These are equally valid examples, and none of these are the end-all and be-all, either.