The Chinese 8-ball I've seen did not require you to call shots but if there was anything funny about the shot it didn't count. On one shot a ball straight into the side jumped up, hit the cue ball again and went back in the side. It didn't count.
You just cured me of ever wanting to play Chinese 8-ball.
.....seems like the bar rules crowd has no cultural barriers.
We have one of those tables at our room....it would be interesting to play one pocket on.