I don't find value in bottled water, so I prefer the free stuff. I'm drinking wine or beer, I still want water, and don't want to pay for multiple beverages. If I'm drinking just water, I might end up with two 1L bottles just for myself. No thanks, just the complimentary/tap please!
I have never asked the price of the water, I assume a bottle incurs a fee and just go right to "tap please".