A 160-square-foot PNC Bank "branch" has been open near Michigan and East Congress Plaza Drive since mid-May. Jessica Maxey-Faulkner, a Chicago Park District spokeswoman, said the structure is legal, and that many people support bringing in more money for the parks through alternative means. One of the many ways the Park District raises money for its parks and program is via "our concessionaire, permit and rental opportunities. Bob O'Neill, president of the Grant Park Conservancy, said the temporary deal with PNC was worthwhile for the revenue it provided."It's a pop-up ATM structure that's moving," O'Neill said. "It is there, it was put there by the Park District, and it's bringing in $120,000 in revenue. It's not a permanent branch." O'Neill said the money would help fund the replacement of grass and trees at the old skate park in South Grant Park.