Happy birthday.

No speeches for me. Ugh! They are for weddings and 21sts and are boring.
I had about 20 guests. I paid for everyone. I don't think it's good form to ask people to pay for a party you're inviting them to.

I only invited females - solved that problem! But to be honest I think if you are going to invite any partners, you need to invite all of them, or it does look a bit funny. Could you get away with just girls?

Btw barefoot bowls is a great idea!