We met with a reputable catering company recently and they told us that if we bought our own alcohol, they would charge us a corkage fee of $75 per keg, $25 per bottle of spirits, and $10 per bottle of wine. If they brought it in themselves, they would charge us 100% over the price of the keg/booze. This is mind-blowing as far as I'm concerned. Is this standard practice? Should I be concerned? What's everyone else's experience?