I was in the T1 Servisair lounge not so long ago.
There is a free bar indeed (excluding bubbly). usual spirits on offer aswell as beer / wine / soft drinks.
Food offering was the usual snacks (KP crisps / Walkers Biscuits / pre packed cake slices / bowl of bombay mix). There was also soup on offer, served with crutons & petit pains aswell as a lovely big carrot cake
Free wifi aswell. If I can remember correctly, I think I seen a couple of PC's that guests can use, perhaps for a fee though.
Even though I had already used up my 2 free visits on my lounge club card (courtesy of the Amex Gold), using your Lounge club card means you only pay £15 for the pleasure. For me, it was worth it.