  Let $(X, \mathcal{B}, \mu)$ be a probability measure space and $T_1$, $T_2$,
$T_3$ three not necessarily commuting measure preserving transformations on
$(X, \mathcal{B}, \mu)$. We prove that for all bounded functions $f_1$, $f_2$,
$f_3$ the averages $$\frac{1}{N^2}\sum_{n, m =1}^N
f_1(T_1^nx)f_2(T_2^mx)f_3(T_3^{n+m}x)$$ converges a.e. Generalizations to
averages of $2^k -1$ functions are also given for not necessarily commuting
weakly mixing systems.
