It appears the Diesel has finally found its niche. The Diesel began its life as a new home for Toronto's Second City (http://www.yelp.ca/biz/the-second-city-mainstage-theatre-toronto) and there were problems from Day One, sadly. Second City having moved from the Old Firehall on Lombard was used to tightly packed crowds in a small venue. When the move to the Diesel happened, Second City was welcomed with a large amphitheatre with elevated tables along each row and space between each to allow wait staff to bring in food and drinks with ease. Though a truly novel concept, this did not work for improv. Second City has moved to a newer space now behind Wayne Gretzky's (http://www.yelp.ca/biz/wayne-gretzkys-restaurant-toronto), but now the Diesel can use the novelty of its set-up as an advantage.
Upon entering the Diesel, you mount the stairs (or elevators...don't worry it's wheelchair accessible) to the top floor where a long bar will afford you a pre-show drink. Upon entering the venue, you are taken to your seat and again, there's ample space in front to allow the servers to bring refreshments throughout the night. The playhouse has still housed some sketch and improv, but has been used more often to put on stand-up comedy showcases as well as runs of plays such as the much acclaimed "Evil Dead: The Musical". Putting on a zombie show? Yeah, it appears to have found its way.