I had about 5 beers this past Sunday and I am going in to meet my probation officer for the first time tomorrow, Thursday. Should I expect an egt test and if so will I pass?

Should you expect an EtG? No way we would know. We don't know why you were arrested or what the terms of your probation are. Will you pass? Probably, but is the stress worth it?

Yes, most PO, give a test on the first visit. Often they use it as a baseline for future tests, and may give you a little slack if you fail the first one. (some don't)

At that time frame most likely you will pass.

You're question has been thoroughly answered by the experts here. All I can give you is a bit of advice:

If the terms of your probation is sobriety then it is best for you to adhere to that. What you've done here is accepted an agreement to be conditionally release from prison. There are specific terms to this legal contract, as well as specific punishments if you break the contract. You can't look at this as restricting your freedoms and your desires. As soon as you start doing that you're going to try to sneak around and violate your probation contract without being caught. This may or may not work, but in the end you're going to be stressed out and that's never good for you.

You need to control yourself and make sure that you don't put yourself into situations where you could violate your parole. This will be boring and frustrating, but once you're done with your parole you can do whatever you legally want again. Look at the current pain for the future gain.