Deceivingly large is one way of describing the Horseshoe. Also, centrally located and great atmosphere. Sort of get a small town bar vibe there when there's no show. The bartenders are super friendly from my experience, chatty without keeping you there awkwardly long and quick with the service. Pretty standard Ontario beers on tap with some of my personal favorites there as well (Tankhouse, Wellington Dark, etc) with pints for $6 I wasn't too grumpy.
They usually have great shows that come through the city and it's a big venue space in the back which is great. Went on indie music open night on Tuesday which was also pretty fun. Nothing that made me want to root out the band's name but also nothing that made me want to cover my ears and move as far away as possible.
The sound quality was also really great. At some of the smaller/indie concert venues everything is perfect about a place but the sound from the speakers and the faces of the musicians indicates that something bad is happening. Not so here. Massive sound board to deal with that. No cover as well (on Tuesday). Good for you Horseshoe.