Head Table

We recently toured a venue we really like that provides a beautiful head table. It is a long table that seats about 15-20. The idea is to seat the bride, groom, bridal party, parents and grandparents. It occurred to me recently however, that the bridal parties plus ones, SO's, husbands, wives etc. would not have a seat at the head table. Therefore we would have to seat them on their own at appopriate tables (with family or friends they know). Has anyone had experience with this? I feel like this might be awkward for plus ones and would hate to make them feel uncomfortable but also don't need everyone's plus ones at our head table. Any solutions other than going sweetheart table? Thanks!