I visited the Plaza Premium lounge at HYD and found the following (or not!):

1. Wifi ok, but you need the lounge dragon to set it up for you - it is a convoluted process!
2. UK power sockets available but you need to look under the tables to find them.
3. Toilets functional - didn't use the showers.
4. We were there in the morning which may explain why there were no alcoholic drinks available - very thin and highly processed orange juice and bottles of water - food offering was very bleak.

Lounge entrance is a lift right inside Gate 32A - you have to go right up to the gate and you will see it to your right.

There are some pretty good looking restaurants outside the lounge which I may try instead next time!