From Eater Chicago, it look as though Southport & Irving could be for lease.
"One of West Lakeview’s more popular restaurants is available for lease. A Craigslist ad is up for Southport & Irving, also known as SIP, priced at $8,000 per month. Management hasn’t responded to an inquiry by press time so there’s no word yet whether the restaurant at 4000 N. Southport Avenue might close or just change ownership. Stay tuned."