If you play long enough it will happen eventually.
So the event is that you get dealt AA of the same suit at two tables at once:
If you just play two tables, and one hand at each table then:
((52over2)/6)*(52over2)= 293046
So between 3 and 4 times in a million that you will get dealt AA in the exact same suit on both tables at the same time.
However if you play more than two tables, then you have a lot of combinations, and the hands are usually overlapping, (ie one hand start before the other finnish).
Let say you play 4 tables and hands overlap. Then this will occure 2*(4over2)=12 times as often.
For 10 tables: 90
20: 380
30: 870
and so on...
So if you play 30 tables at once, at a speed of 70 hands/hr, then this event would happen about once every 4 or 5 hrs.