Those can be OK, but not more than that. 
The trick is to get drunk on something better, first. Then, when you can't taste it, drink the Guinness. 
Guinness tastes bad? I'm lost. I like it.
The Guinness in a can tastes bad. Get it properly prepared for you and it's wonderful, but not the stupid canned version.
Maybe you're defective.
Well, actually I am, but not in this particular respect.
(that from a guy who can't taste anything but minerals ...
)

I do wish I had *something* with alcohol in to drink. I really, really, would like a drink now.