Hi, my son has just started in reception and we would like to have party and invite all of his class (17 children), however the soft play that we would like to book (as its my son's favourite) only allows 15 currently (restricted due to covid). I'm wondering if it is likely that whole class will attend, or do I take the chance that a few won't and I can book for 15. Mummies with experience of parties, please can you tell me the sort of turn out you usually expect?