There are some ways to get Court Marriage in Delhi done depending upon the time the couple and witnesses have.
If you are short of time, then you can opt for Arya Samaj Mandir Marriage and then registration of the same from court. Both the procedures can only be done on different days because government of Delhi doesn't allow court Marriage on the date of marriage. It takes around 2–3 days if you choose this option. On first day Arya Samaj Marriage is done and on next working day court Marriage certificate from Delhi is issued. The certificate of Delhi Government is full proof of marriage and acceptable world over so my advice is even if you have to visit twice and pay more always go for Court Marriage in Delhi.