Red Square is a terrific fine dining experience and a terrible lounge experience all in one!
On my brother's first night in Vegas, we took him here for dinner. The food was really great and the Communist themed decor was charming. We had a wonderful, filling dinner capped with delicious signature cocktails. I already liked Russian food and I was impressed by the kitchen's attention to detail.
A night or two later, we came back with the entire wedding party. We wanted to toast the bride and groom with the whole vodka bottle service in the freezer shabang. Little did we know that the staff at Red Square were going to want to close a full two hours early. No kidding, I was shocked. The hostess who was so friendly only a couple days before delivered our mixed drinks and hovered at the bar until the millisecond she could collect our check. She even closed the front door and turn away new groups that wanted to come in.
Definitely consider coming here for dinner, but no later than 8pm TOPS.