If you think about it, why would a bouncer even let a disguised person walk into a bar? For all they know, they could be a blacklisted person. While shrouds and hoods are a common sight on the streets, and you'd look like an asshole for calling them out, I just don't think the same should apply in a bar situation where a bouncer would be keeping an eye out for troublemakers.
Since not all bars have coded NPC bouncers, the way it could work could be just that the bartender just doesn't let you buy a drink, and tells you to lose the disguise or get out.