We're doing a buffet dinner with Prime Rib and Turkey Breast, and I want to provide wine for the dinner portion in addition to the open bar. My main question is: should I just leave bottles on the table to guests can help themselves during dinner or should I ask my caterer (who is also providing the open bar and bartenders) to serve the guests? I want my guests to have as much as they'd like without them having to get up and go the bar every 10-15 minutes, but I also don't want to wear out the service staff.