Hi Jimmy.
Mayo Leisure in Castlebar is very good, we have visited there quite a few times.It mainly consists of a Bowling area,air hockey table game,pool/snooker,amusement games etc.There is an area for young children(not sure up to what age) which is supervised.This area has climbing frames, ball pond etc..
The Quasar (Lazer game)would be for older children.......mind you we were on school trip there and the adults ended up joining in with the kids and it was great fun!
There is an a cafe/fast food within the building.There is also a new Cinema as you walk out the back door of Mayo Leisure Center.There used also be a Go Kart area outside the building, Im not sure if this is still in operation.I would highly recommend this place .Enjoy yourselves if you visit it.C.C