Work got busy the last few days before my trip, so I haven't had time to meticulously scour the web for in-depth reviews and pictures of every chair and every food item offered at each lounge. So I'm soliciting FTers for opinions:

I have a layover at ORD 6:30-13:00 on my MSP-MLH first class award booking. From what I can tell, I'll be arriving and departing T3. I'm new to lounges and haven't been through ORD in years.

1. Can I get into T5 without a departure boarding pass for that terminal?

2. If so, which lounge should I head for? I assume I'd be allowed into any BA or AA lounge with my 'Z' boarding pass?

3. If not, which lounge in T3 should I spend my time in? Looks like Admiral Club and Flagship are my two options.

My wife and I both have enough computer work to catch up on that we're not considering a trip to town.