In reply to Sallie Goetsch.

I was going to suggest, the difference of

Alcohol at a bar - VS - Alcohol at a held WordCamp Social Venue location, not being a bar

How-ever the bid for bars to cater at a non-bar WordCamp Social Venue

could be a potential solution

the two drink token idea is cool

now after the respectable hour is over at,
the
WordCamp Social Venue,

a party bus is available
to drive our loved community to the after - after socializing caterers bars

an incentive is to invite the community party goers
the the no wait in line entrance
for them to keep on keeping on with
making good times

these layers would be potential solutions for making sure our community, wanting that party late environment
offer a, get me home safe token
just for that event

non drinkers in the community ( the good doers ) can still hang out to get people safely to their local destination, with good doers stars.
( is the plugin available yet? )

also maybe keep on serving H2O, coffee and tea
along with your other drinks till the end of all
events to too

it is a good idea to not highlight Alcohol
having to do with the function

maybe even serve the Alcohol beverage in a non
advertising glass,
because if that photo goes online
its becomes advertisement.