At IAD on my way home to NY. Checked out the Turkish & Lufthansa lounges. I have both Star Alliance Gold & Priority Pass Select from my Chase Reserve card. The Turkish lounge was not allowing any Priority Pass members for 30 minutes (how does this work??) so I used my status to get in.
The Turkish lounge was packed and hot when I walked in. They have room to hold your bag while at the lounge - quite convenient. The lounge is split into two sections. The first one you enter has the food. The second has the bar. There are bathrooms, a shower lounge (one) and a prayer room in between the two sections. The bar area was less busy, but still quite crowded. The bar selection was pretty basic, but all free. I got a Rum and coke which was pretty weak. The shower lounge was empty, but very basic... And HOT. I also found it pretty noisy with the low ceilings. Unless I was stuck, I wound not want to use this.
After 30 minutes at the Turkish lounge, I headed over to the Lufthansa Senator lounge. The lounge was quite airy and cool. Solid bar right when you walk in with a solid selection (Glenlivet 15). The food looked solid as well (alas not too many Kosher options). I had a peach and some pretzels. They had a nice selection of newspapers and magazines. Plenty of seating. While it was quite full when I arrived (around 4:00 PM), it emptied out around 5 when the Austrian flight boarded. Solid Wi-Fi at this lounge as well. However, Google figured that I was in Germany (they must send the traffic over to Germany first). Nice clean bathrooms.
Go to the Lufthansa senator lounge if you have a choice. Pics coming soon.