Comming back to your request. You can just type in a chat something like "Eng decks only". That's all. No point in creating a special room ~

Sorry, but this simply doesn't work. Nearly most of the Random Area Users are stupid. Sounds hard, but after seeing multiple redraws or misreads like everyday, this is a fact.
A special room is necessary, otherwise it's not possible in Area to test out Real Life-Decks properly. I'm sick of always facing Legion, when I want to test out my RL-Deck and getting weird results, because getting "realistic" opponents simply isn't possible.

You created a deck in Real Life and you want to test it out on Area. You want to test it out properly before attending to locals or Regional Qualifiers. The Problem: 90% of the Area Players playing Legion. A Mechanic which doesn't exist in english metagame 'til Late 2014-2015. So Legion won't be relevant for Regional Qualifiers. Because Legion has taken the game on a new level, older Limit Break-Decks having Problems with that. So, testing a Deck for english metagame is nearly impossible.
Therefore, here my request: I want a Room where only Decks possible in the english metagame are allowed.