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DRESS CODE
Business Casual
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Business attire most common
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Nice jeans and proper shoes likely OK
The dress code is business casual. Men may be required to wear collared shirts and dress shoes, and prohibited from wearing shorts, t-shirts or sandals.
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OVERVIEW
Sullivan's Steakhouse in Naperville is a casual fine-dining restaurant that specializes in steaks and other American-style cuisines. The restaurant has a full bar and wine list and is known for its live music and jazz performances.
Comments
From around the web
OpenTable
Business Casual
opentable.comTripadvisor Discussion
Business casual would be what I would suggest also. This is a fine steakhouse where one should be comfortable in a dress.
tripadvisor.comKayak
Business Casual
kayak.com