I tried Embers for Happy Hour with two friends.    I'd go back but my experience this night was average for one reason: No spicy mustard.  How can any place do burgers (and Embers has many on menu) with only yellow mustard?  I was scandalized and disappointed.    No dijon? No deli mustard? Not even honey mustard?  I did love our server and enjoyed the sides. My burger was good-  reasonably priced. My tablemates loved their wine and meals.  But the mustard thing was a downer for me.    I hear they have a great weeknight happy hour and dinner is great. I'll go back - but I'd bring my own mustard.