***Not a teacher***
To 'get a bang out of' something is not a phrase I have ever heard anybody use in the UK. I can see from the dictionary that it is a valid expression, but I am not sure whether it is a common term in the US (any AmE native speakers care to comment?)
In the UK, you are more likely to say something 'went off with a bang' - presumably a reference to fireworks - 'The party went off with a bang' or just 'The party went with a bang' means it was a really good time.
From the dictionary, it looks as if 'get a bang out of' means what you suggest - i.e. to get pleasure from something.
You also need to be a bit careful, as 'bang' also has a slang/vulgar meaning in some contexts, so 'I got a big bang out of the evening with her' might raise a few eyebrows