I still think I’d be nervous and excited at the same time. If she starts touching him I’d know she’s interested in him. I’d be wondering how far she will go with him. Will she kiss him? Will she feel his cock? Will she walk outside with him and give him a blow job? Will she invite him back to our room in hopes of fucking him?
If your wife does not automatically assume every guy that approaches her was sent by you to hit on her and fuck her, you are not trying hard enough. A good husband should do his best to let every man know that his wife is available and looking. Be a good husband, ask other men to hit on your wife.
The drunker she gets the easier her legs open for real men.