I saw Ponytail at the Black Cat a few years ago and thought they were awesome. Most of the friends I came with couldn’t stand it because the lead singer is kinda a Yoko. The intensity and rawness of the guitars and drums are what captivated me during the set. But amongst all the frenzy there was a collected precision that took it beyond the normal mosh ordeals. Front row eyes were glued.
Weekends is also a bass-less, spastic group from Baltimore but instead of 4 members, they sport 2. And apparently they switch between drums and guitar during their set.