Rowing is a great workout that can burn up to 600 calories per hour. Most gyms only have one or two rowing machines so if rowing is your work out of choice you have to wait, unless you are lucky to find one, unoccupied. What if there was a fitness establishment that was solely equipped with rowing machines? Well there is and it’s called Stroke SF. Today’s deal is for 5 indoor rowing classes at Stroke SF for only $40. This is normally a $90 package. Stroke SF is the first indoor rowing studio in the city and it is located in the heart of the Financial District. They offer convenient hours and a choice of classes designed to work your core, address cardio and tone your arms, shoulders, legs, butt and more.