Colonel Mustard's is a popular bar in Markham, and for those that want to stay local this would be one of your choices.
Its nothing fancy, but your typical bar that serves up some pints and pub fares. They're known for their music karaoke nights on the weekends. In terms of foods I've had their nachos which were 'alright', however wings are quite good. The service ranges from good to terrible, depending on how busy it is.
This place is more of a dive bar, but its popular since its always crowded.
In terms of cleanliness, its about a 2.5/5.