Double check the cost of the drink coupons, I thought they just increased that to almost $20.00.
For $20 I don't think it is a good idea, not with buckets of beer, drink specials of the day, etc. I don't know how much soda is as I am not a big drinker of that. Others I am sure will be more helpful.
The wait staff does not mind, they get these all the time. And the tips are automatically included with drinks.