markandoliv

Getting married and applying for SSN are not directly related. You are eligible for SSN once you have legally entered as a K-1 and gotten your I-94. Again, applying for AOS once married is not related to having obtained your SSN or not. I applied for my SSN 2 days after arrival and got married next week. Then I planned to file for AOS asap and the first version of my I-485 was like "no, SSA has never issued me a SSN, yes, I want it to". Eventually I filed in 6 weeks having received my SSN in 4 weeks. I corrected my I-485 then. Having your SSN, according to my experience, may be crucial for at least 3 things: opening your bank account, personal checking or joint with your spouse, being added to their health insurance plan and applying for your drivers licence. 

You don't have to wait.
You can chose either "Yes" or "No" for the request question. It's not an issue.

Apply for an SSN now and make your life easier.

No issue. You can even go to the SSA and request a SSN before November 14 (they won't let you apply if you have less than 14 days before the I-94 expires). If they issue a SSN and then later get your forwarded request* from USCIS, then they will not act on the forwarded request.
*Forwarded request would be after I-765 approval. That is about 5 months from filing.

Getting the SSN will make your life way easier. And you don't need it to file for AOS.
 
You can apply for the SSN and send the I-765 without requesting for one. The waiting time for EAD/AP is over 6 months and some people get the interview scheduled before getting the combo card. 
 
So I'd personally recommend to get the SSN now; there is no point in delaying it. 

If you're not changng your name and you still have enough time on the I-94, you can apply after marriage.