I forget, or don't know, what and where you matched, but you are one paranoid f*cker. Maybe it's where you interviewed or the specialty you matched in, but please disregard his advice when it comes to EM.
At least at my program, you order what you want, drink what you want, and say and ask what you want, when you come to the pre-interview dinner. No one at my program asked me after the dinner if there was anyone ordering anything too expensive or pounding too much of the top-shelf swill. If you spill beer on me, or hit on my wife I might be pissed, but otherwise we're just there to give you informal, candid info about the program without faculty present.
And if you hit on my wife, I'd probably deck you, but I certainly wouldn't blackball you from the program. I just wouldn't leave you alone with my wife.
Jeeze.