To be safe, any establishment in which serves alcohol whether its in the non-bar area or not, you are prohibited from conceal carry and are required to open carry. The whole establishment is typically considered off limits for conceal carry due to the wording of the law. This would include places like Applebees, Montana Club, Red Robin, Actual Bars, etc.
I understand your confusion, I will update the sticky montana laws post to help clarify.
The actual law regarding conceal carry is 45-8-328(c) which is quoted below:
*There was an attempt to fix this law this legislative session and the last legislative session, both times the bill was vetoed by the governor.*Originally Posted by MCA 45-8-328