Congressional Plaza on Rockville Pike is getting a summer mini-makeover. The bustling center is renovating its towers, upgrading landscaping and signage, and expanding the outdoor courtyard between Chopt and Starbucks. The extra seating will provide more space for socializing and also help to accommodate overflow from the center’s growing list of fast-casual restaurants, including the upcoming Modern Market. Also heading to Congressional this fall is Saks Off 5th, the discount branch of Saks Fifth Avenue that’s building out the former Tiara space between Performance Bike and Oxygen Salon.