So far the main bugs I have are the the standing-while-drinking and other restaurant guests wandering around and not eating their food. However, not all guests were wandering, just this particular blonde couple here.
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Just chillin' in the kitchen, no big deal.
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Some of the guests standing around while drinking (also, clown hair, ugh).
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The blonde couple eventually sat down when their food was served, but only the woman finished hers. The man didn't even touch his. They were super cute, though; they kept flirting with each other. Guess the guy was too busy. ;)
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My Sims behaved perfectly fine. I even brought my club over, and after spotting one of my members heading towards the kitchen, I just chose "Sit Together" and everything went along perfectly. I haven't tried running a restaurant yet, but I am very pleased overall with eating at one. :)