Correct me if I am wrong
Certainly:
1. In conventional Western musical notation and performance, no rhythmic pattern exists that does NOT have accented beats, and no pattern exists where every beat is accented (which of course is the same thing, just louder!).
2. Strong, Weak, Strong, Weak (the pattern of alternately accented beats) is the pattern of duple time (2/4), and that is NOT the rhythmic pattern of common time (4/4), where the stress pattern repeats over four beats, not two, with a primary stress on 1 and a secondary stress on 3. They are not interchangeable, and it is not merely a matter of different notation - ask a percussionist.
3. I am not advocating 4/4 tango - I find it loathsome, and contrary to the character of the dance. I accept the fashion, and can't change it, but NO respectable teaching society recognises tango danced to quick beats in groups of four, so I am not in a minority of one, am I?
4. 66 beats/minute 'banged out' each the same as the last is EXACTLY what current technique does advocate - wrongly, in my view. Tango 'works' in duple time at 66 bars/minute (so 132 beats/minute) with the rhythmic pattern of strong, weak applying to each pair of (quick) beats. If dancing a series of walks (slows), each walk would fall on an accented beat. This is something close to 4/4, but it is not the same, and they are not interchangeable.
