IIRC LOT leaves from T4.
I do no know the status of the current lounge, but in past you
could use *A Swiss lounge. It had showers, hot food(depending on the time),
drinks, snacks.. the usual.. and free Wifi.
It overlooks the airport tarmac.
All the lounges are on the same level as check-in and in the back
before the Security check points.
Since LX moved to Terminal 1, I do not know the status of this lounge
in T4.
Can someone confirm?