I’m not much help on the specific question, but I hate to have it die on the vine. So, I’ll offer what advice I have.
I know a couple of people who shop at DXL and I’ve heard them recommend it to others, so I’d check with what they’re offering. The guys that I know that shop there dress well.
The other place I’d look is Bonobos. They’ve got a wider selection of sizes than most retailers and I’ve been happy with everything I’ve bought from them.
At a bar I don’t know, I’ll usually order off their menu or go for beer. I’ll try whatever they are saying is their specialty, or I’ll just pass on the whole mixed drinks affair. If I’m at some new bar I’m probably not trying it out as my new favorite spot, I’m probably visiting someplace and will never be back. I just want something tasty and easy.
Over the course of this summer I went against my better judgement and I tried to order boulvardiers at two different bars. Both times it was at a nice bar that appeared to have a modern cocktail program and both times led to lengthy discussions about what I was asking for.