It's very common in the South Asian community but it depends on families. Some rent halls and have all sorts of entertainment show up like a wedding (personally, i think this is super overkill but if you got the £ enjoy!)
When my wife and I got engaged, my inlaws wanted to celebrate and get both sides to meet. They have a 4 car garage ( 2 cars deep) which was used. No, they aren't rich but rather her dad had his own at home business welding so needed the space for work etc.
Anyhow, they cleared stuff out, decorated it to hide some of the equipment and invited their side (her 1st cousin's and their parents) and we did the same on my side. Sure, it was like 100 people or so but it was simplistic and fun.
They catered some food in, made some and setup portable tables and chairs. One or her cousins has dj equipment so put tunes on. I think of it as just a big family house party from both sides combined.