Thanks for the review! A few things came up for me and I couldn't attend afterall, unfortunately. However, I've tried most of the beers you mentioned, so I thought I would comment on two of them.
First, Domaine DuPage on tap is a very fine, outstanding, beer. However, it isn't all that great in bottles. The flavor profile changes quite a bit. However, right across the parking lot from RBB in Warrenville, there is a "TGIFriday's-type-of-place" which had Domaine DuPage on tap and it was a vastly superior beer to the bottled version.
The second comment I wanted to make is that the aroma of The Roundhouse's Chocolate Pale Ale is much more Chocolatey than vanilla-like. I think your eyes tricked you into expecting vanilla. The aroma is pure chocolate. However, it doesn't come through all that much into the flavor, so I understand how that could be mistaken for vanilla.
In Process: Mango Beer, Homebrewers Pale Ale
Bottled/Kegged:Spicy Light Rye, Rice-adjunct Pale Ale, Mild Bourbon Porter, Roasty Stout, Basic Light Mead, Bourbon County Stout Clone
Up Next: Berlinerweiss, Chocolate Raspberry Ale, and American IPA