Ballroom dance continues to gain in popularity in the Duke City as one of its studios completes a big expansion this month. CSP Dance Studios is in the tail end of building out a new space in the former Laffs Comedy Club space at the Fiesta del Norte Shopping Center in the Northeast Heights. The space will feature almost 7,000 square feet of a floating wooden dance floor in two ballrooms, making it one of the largest in the city. The studio is moving to 6001 San Mateo Blvd. NE from its home at…