There's a lot of live entertainment once the sun comes down. Even during the day there was a duo playing across from D-Luxe burgers, but yeah, most of entertainment plays after 5pm.
Just off the top of my head:
West Side: Live group outside of House of Blues, Splitsville, Exposition Park (where the food trucks are), outside of Starbucks
The Landing: Live music at Waterview Park (next to Jock Lindsey's) Inside Boathouse, T=Raglan Rd, Riverboat, Paradiso37
Marketplace: DJ Kids dance parties at the Main Stage across from World of Disney and at the fountain stage, live music at Dockside Margarita
Town Center: Living Statues and live music at Welcome Center across from D Luxe Burgers
As to everyone's opinion about it being like a mall I have to agree that Town Center is basically a high end shopping center, the main goal is to have guests come here instead of the Florida Mall or even the Outlet Malls. I found some stores to be priced fairly and others way expensive, this will make a killing with the South American groups that come every year, I'm sure.
There's a story to the whole concept of Disney Springs so it was well planned out.