pvc's and alcohol

Is it terrible to have a few drinks once in a while?   I am going to Vegas and I know our group of friends will be drinking.  I have heard that alcohol and trigger pvc's.  I'm nervouse to do anything with these things because I am trying so hard not to drink caffine, have to much sugar, no alcohol....my life is very boring just to prevent pvc's.  They are miserable for me as you can probably tell.  If I do decide to start taking my beta blocker (Tordoral)  can you drink alcohol while taking that?  I know I should be asking my cardiologist, but he already thinks I am a big worry wart....