I think it depends on the execution of the wet bar.
Some are just an alcove in the wall (like a media niche) and others you can actually step behind like a real bar.
It also depends where it's located. Most are part of the family room (at least most of the ones I see) but some are part of the living room.
A relative of mine has the alcove style one in their family room and whenever they host are parties, they use it for a coffee bar, appetizer bar or dessert bar so it has other function rather than the alcoholic type.
In more modern plans, it's been replaced by the butler's pantry (at least the ones with the sink) and is usually hidden as a hall between the kitchen and the dining room.
It does look a bit out of place but depending on your lifestyle, you could find use for it (as my relative has).