Question About SF Groups Tickets

I have a problem.

My friend has two tickets for the Saturday, Oct 1st games which I was looking forward to purchasing for my wife and I. The problem is we have a 7-month old daughter who we were planning on bringing to the event until we found out the venue is requiring us to buy a ticket for her (which we obviously can't do since there are only 2 tickets available). I simply don't understand why airlines, sporting events, zoos, literally any other event or venue you can name has accessibility (e.g. special lap infant tickets) for this circumstance but this event doesn't.

It took me long enough to convince my wife this would be a fun family outing, but at this point I can't make another day work and convincing her to pay 300% face value for 3 tickets from stubhub is certainly out of the question.

I love League of Legends and have followed the pro scene since its inception. I attended IEM in San Jose and have been anxiously awaiting another event in the Bay Area. Riftwalk even sounded like something that could appeal to my wife.

If there's a Red poster with some advice I'd love to hear it. -lotharstar