So our reception is at a beach bar. They provide all the tables, lines, etc and it's very beach casual. However, the tables are small squares that seat 4. The guest list is only about 40 people so about 10 tables. There are many people that work together (military) and then some family members. Our families are seeming to come out in sets of 3, my grandma, mom, stepdad...his mom, stepdad, sister etc. So we werent sure how to assign them to seats without leaving a random person at the table that wasn't part of the family.
So what I'm asking is is open seating ok? I expect a lot of mingling because everyone knows everyone mostly. We all get together for bbqs almost every weekend. Everyone is very comfortable sitting next to just about anyone.