I also think Sana has had a little too much to drink. Note the three beer mugs on the table (there are three of them, but since Liliant seems to be drinking wine and Mienshao has a sake cup in her hand, I think it's quie possible all three mugs are Sana's) It is even possible that big brown bottle by Mineshao's arm is the beer bottle (the table is covered with little sake bottles, so presumaby the sake in in them (I admit I am not familiar with sake serving etiqutte)) and Minesho has taken it out of Sana's reach before she does something to REALLY embarass them all.