At our wedding two years ago, we drank different (better) wine at the rehearsal dinner. I planned the dinner, and wanted really good wine with my meal. Nobody noticed, and it was a really fun evening. As for the actual wedding reception, I just drank whatever plonk they served. We were too busy talking to other people, doing the special dances, etc to enjoy nice wine. We did have a nice bottle of champagne later in the honeymoon suite.