Could someone please give me the definition of Parlour Magic. For instance, what exactly is Parlour Magic? Thank you for your help.

Here is a description of Parlour Magic as I know it. Think of it as a show that is a little more intimate than a stage show but bigger than a close-up show. So it is rather in-between a stage show and a close up show. You're not close up, where people are literally gathered around you in a semi-circle, but you're not necessarily up on a stage with a huge audience either. I hope this helps.

The Parlour of Prestidigtation at the Magic Castle is a 99 seat theatre. Basically, if you are not doing the big box stuff, you can be considered doing parlour.
I can do the same show for 10 as I do for 100. I adjust a few things for vision - eg. for the 3 1/2 clubs, the bigger the audience, the bigger the 3 1/2 clubs I use as a finish.
Try not to get caught up in this kind of terminology. My promo stuff says something like - audiences from 1 to 1000. (I also work large venues with other items in my repertoire.)