My FI and I can't afford a giant reception, we're both grad students and are trying to keep costs low. The problem is we can't afford to invite any of our friends because the families are so large. He and I recently went to a wedding where the bride and groom did something like this (idea is below) and no one seemed to notice and it was a ton of fun.
Idea:
Invite everyone we would like to be at our wedding to the wedding. Invite only family to the formal dinner (they will be invited to stay for drinks, dancing, etc). Our friends will also be invited to the ceremony but will get a reception card inviting them at a certain time to drinks (open bar) and dancing. We would not start any of the traditional festivities until 8:45 so that's when our friends would be invited. So both groups get save the dates (which will read "save the date for our wedding ceremony - or something similar), both groups will be invited to drinks and dancing, but only family and bridal party will be invited to dinner.
Our reception place will work with us if we decide to do this and only charge us the bar price per person for the extra guests (which we can swing). My question is, is this rude? I know it's unconventional and unorthodox but we are literally heartbroken over not being able to invite any friends because our family is so large.