Yeah, FRA is the pits. The LH lounges aren't even that great (although, leaps above RCCs).

It's a smokey airport, too. Actually, since the lounges there suck--I prefer to spend my time at the casino.

However, at the UA RCC, when you walk in and go to the right, then make a quick left, there are a few desks & chairs--it's generally quiet--a great place to set up the laptop and watch planes, if that interests you any.