take pot luck
To select blindly from the available options in the hopes of achieving a fortunate or beneficial end result. I like to just take pot luck when I travel to new cities and try out whatever local establishments I happen upon.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Come to eat whatever happens to be served; also, take one's chances. For example, You're welcome to join us for supper but you'll have to take potluck, or When the flight was canceled, passengers had to take potluck on other airlines. This idiom alludes to accepting whatever happens to be in the cooking pot. [Second half of 1700s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.