I toured 6 Finger Lakes NY wineries in late July and a lot of these points resonate with me. We went on a Wednesday so there were no crowds.
1. SMILE and great your guests.
At one winery the woman running the tasting bar was doing some paperwork. She immediately looked up, smiled, and said, "Thanks for coming! I will be with you in just 1 minute!". She quickly finished whatever she was doing and devoted the next 20 minutes to us.
At another winery it took nearly 5 minutes to get an acknowledgement from the 2 workers. We purchased nothing there. [Even with tasting fees, I typically purchase a bottle when touring a winery.]
3. Educate your tasting staff.
Gawd, yes! There's nothing worse to get "I don't know" in response. However, at one winery the young lady told us she was new, she didn't know, but she'd ask. I asked several questions, and in each case, she got an answer for me. Her attitude was perfect.
1 oz is good, especially for folks touring multiple wineries. I've had wineries pour half a glass (~3 oz), and that's a great way to get plastered, which is never my agenda, even with a DD.
We make good wines, but by no means the best wines, but we have learned to SELL the wines.
Be willing to pour an extra wine or two, beyond the tasting. It enhances a feeling of good will, and may enhance sales.
All of the points listed enhance the customer experience, and happy customers buy wine.
Have crackers available to cleanse the palate. Use separate glasses for reds and whites if possible; if not rinse well between red and white.
This! Rinsing between styles of whites also makes a difference.
With the advent of self-guided tastings, having 5 or 6 wines served in a tree solves that problem.
If you can, also offer wine by the glass or bottle. Living in wine country, we often go to the local wineries late in the afternoon on Sundays or weekdays and have a glass of wine to wind down from our days.
We noticed this -- it's apparently getting more and more common. For my group on a tour of numerous wineries, it's not of interest, but we saw quite a few folks buying wine by the glass.
Make sure the tasting room has enough glasses. Figure out how many you need and then multiply that number by 10. Make sure you have a way to store the glasses AND to wash them quickly. I've seen restaurant-style glass trays in larger wineries, so my guess is they installed a professional dishwasher to clean large quantities of glasses at once.