Bitcoin unusable UTXO Attack could be happened?
Technically, sure, this is possible.

Practically, you might get away with it the first time.  You'll have effectively paid an extra $9 for your $40 round of drinks, but you'll get the added satisfaction of having been a jerk.  The bar owner will realize that he can't spend the money, shake his fist, and write off the cost of the drinks (which is probably more like $10).

The next time, you'll find a sign posted that says "Bitcoin payment rules: maximum one output".  If you try your multi-output trick again, they'll point to the sign and say "nope, that doesn't count, you haven't paid".  You'll have to pay again, and now you are out $89 for a $40 round of drinks.

(The third time, you'll find a photo of you behind the bar, marked "DO NOT SERVE".  And a very large fellow in a T-shirt will ask you firmly to take your business somewhere else.)