Le Bistro is where Sheila takes Peter for a girls lunch out when he is mistakenly identified as transgender in "Trans-Fat".
After she explains that it is common for the girls to let out small, squeaky farts, each of the four girls at the table proceed to do so. When Peter joins in, it comes out in a watery-sounding blast, which causes him become wide-eyed and hope there is a machine in the restroom that dispenses new pants.