The restaurant at 1406 W. Morse Ave. is the second of Treacy's businesses to shutter this year. The Cook County Sheriff's Office shut down T's in March after building owner Julie Mai claimed Treacy hadn't paid rent for months.
A Cook County judge ordered Treacy to pay Mai more than $60,000, according to a court order filed against Treacy's Uptown property in May.
Treacy also owns the Sidecar and Glenwood bars in Rogers Park.
He confirmed the rumor that MorseL would close while sitting at the bar in the Glenwood Monday night. Treacy said he might open another type of business at the Morse Avenue location.
He declined to elaborate.
A new menu posted on MorseL's front door detailed a smaller lineup with the title "morseL Neighborhood Tavern."
Earlier this month, MorseL's chef, Mary Ann Culleton, left the business to work in R Public House's kitchen in Jarvis Square.
That restaurant was opened by former Glenwood Bar manager and part-owner Renee Labrana, who left the business in April after a dispute with Treacy.
The shake-up caused some regulars of the LGBT-friendly establishment to boycott Treacy's other Rogers Park businesses.
Meanwhile, R Public House opened to fanfare in August.