Can you still use these feats when you're in a real combat, as opposed to performing for a crowd? Like take mocking dance. It seems to be excellent, because it increases mobility and gives you another move action at the cost of a swift action.
However, it requires that you spend a swift action to make a performance check. Would it be allowed to spend a swift action to make a performance check to impress a non-existent crowd (or maybe the gods or some vermin that happens to be watching) to use the feat?
I was thinking about using the synergy of the Kensai dealing maximum damage, which grants a swift action check, to do something like:
Round 1: Charge at the enemy and use performance check to flee 30 ft
Round 2: Let the enemy charge, use the psionic feat sidestep charge to get off an AoO
Round 3: Full attack spell combat and then performance check to flee 30 ft