Here's an idea, getting suburban kids to sample the city through their high school dances...

The Roostertail Entertainment Complex in Detroit, chosen for Sterling Heights High's senior prom, plays host to gatherings of all ages.

From "Motown hall casts wide net: Despite questions, Sterling Heights High seniors will go distance for prom at Roostertail," in the Detroit News:

The Sterling Heights High School senior class recently decided "overwhelmingly" to have its May prom at Detroit's Roostertail Entertainment Complex despite concerns raised by some parents and students. The controversy was ignited at a Booster Club meeting in early October, when a few parents said the venue was too far away, too expensive and too dangerous because of its location in Detroit.

I think if Detroit can market the Detroit River, DC can market the Anacostia and Potomac Rivers...