had issue a few times, once in a delta lounge in miami and once in amex in vegas.
miami - i had my burger opened ready to eat and had a guy tell me i cant so i had to wrap up the whole meal and eat it on my tray table on cold and soggy on the plain.
in vegas i was more frustrated and ended up writing and then speaking later to amex exec (which btw they usually no good, much better if you can find a nice reg agent or manager to speak with from the reg cs line). i have eaten in that lounge a lot without any issues. i dont even think there is a sign if there is its not very visible. i had my sandwich out while i went to wash (was sitting in a corner) only to return to two people hovering over my poor tuna sandwich. they said i was not allowed to eat here, i had a back and forth with them i ended up losing that fight. but it was very frustrating. they used to have kosher options there but that ended pretty quickly. i ended up getting from the amex lady i think like 10-15000 points and i had to even squeeze that out of her.
