The original complaints were that the grand room would have lighting issues and be too loud. If those are no longer complaints <_ then there no reason to get a room.>
If the complaint is that getting to play in 2-3 tournaments at once would be too chaotic then why does it matter what room you’re in? Anytime someone plays in more than 1 tournament at a time they ALWAYS hold either or both up. That’s just how it is. If that’s a debilitating problem for MTG players then either explain in advance that they can’t participate in other tournaments or hold it another day.
On that note, until you can get more than 8 people I don’t think the club should be shelling out cash for advertising and prizes. Not that I don’t like the game (I used to love it) but until you can prove it’s profitable the club shouldn’t be spending cash on it. In the meantime, pick a room, print your own fliers for it, and have fun. On gameday just take up a pool and order some pizza. PCs did this for a freeplay LAN in one of the Belk labs and it was a lot of fun.
Keep in mind though that regardless of when or where you do it, we can get any non-premium room for free.