Is it OK to Drink Beer with a Straw?

Absolutely.

And it is also OK to drink a glass of water with a straw.

But in the case of beer, a straw can penetrate the undesirable head, and thereby make the experience more efficient.

Assuming, of course, that beer is worth drinking. In fact, a case can be made that even most beer-drinkers do not like beer: If they did like beer, then why don't they drink non-alcoholic beer instead of Coke?