open bar

American  

noun

1. a bar at a reception that serves drinks whose cost has been borne by the host, an admission charge, a sponsor, etc..

   Before the banquet there will be an open bar from 5 to 7 p.m.

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Etymology

Origin of open bar

First recorded in 1970–75

Example Sentences

The 21+ beer garden is $40 for the open bar pass or $25 for the zero proof pass.

From Los Angeles Times

Guests — mostly in their 30s and 40s tonight and from the heterosexual monogamous community — huddled by the open bar during a welcome reception.

From Los Angeles Times

There’s also been discussions about revamping the Pavilion Club to provide more segmented experiences; perhaps one section would cater to young alumni with a DJ and open bar while another would serve other alumni who want a more relaxed atmosphere where they can catch up with friends over a pregame meal.

From Los Angeles Times

Higher-tier packages add perks such as gourmet dining, open bar access and reserved viewing areas.

From Los Angeles Times

There was also an open bar serving soft drinks, wine, and beer.

From Slate