I recently was flying with my GF to Vegas and I had to teach her about ordering doubles(For the sake of the FA). We were in Y+ for the DCA-DTW leg, FC DTW-LAS. No issues on either leg.

Some of the rowdiest flights I've been on have been either ATL-LAS or DTW-LAS. It seems like its a destination where the FAs want to give out drinks and the consumers happily accept.