It sounds like you may be interested in trying out a RowErg before making a purchase. We definitely understand your desire to try out the RowErg before making a final decision.
Concept2 sells factory direct and we do not have stores where you can try our equipment however if you are interested in trying a RowErg before purchasing, please visit our Indoor Rower Finder online.
This "Finder" tool will help you find public locations with our equipment. Please call in advance to see if you can try one of our machines (policies vary by location). Some locations may have only older models available, but this still should give you a general idea of how our machines perform.