I don't get it

Could someone please explain the new MGD ads to me? I don't get it.

I'm talking about the ones where people in various clubs/bars will be pleading with the bartender to give them a bottle of Miller, protesting "I'm 25!" There's some allusion to needing to be thirty to sip the carbonated concoction.

Is the point that if you look 30 or younger you get carded? If so, how did these people get into the club in the first place?

Is the point that Miller is for old people (the spin word for this is "sophisticated")? Don't worry, Miller -- my 24-year-old self prefers martinis to average-ish yeast-based beverages anyway.

I'm probably thinking too much about this, but I really don't understand the commercial.