I always tip on my alcohol purchases, and usually tip 20% regardless of how good or bad the service was. It's mainly because the sales tax is over 10.25% in ou

I always tip on my alcohol purchases, and usually tip 20% regardless of how good or bad the service was. It's mainly because the sales tax is over 10.25% in our county. If the tax were only 5-6% like in most places in the US, it wouldn't be as big of a deal. The food prices are also quite a bit higher here than in most places, but that's just due to cost of living. It is not uncommon to spend $200 to feed a party of 4 even without alcohol, so that tip on the extra $20.50 starts to add up.