This is just my opinion. I have a daughter turning 4 this weekend.
The past year she has really enjoyed Playstation. They are fantastic especially if there will be more younger ones. It is my opinion that they are the bets for parties. They have a perfect setup, and everyone is so sweet there.
Inflatable Wonderland is by far her favorite, but there is little to offer the younger crowd and you won't see the kids the majority of the time because they are off in every direction. Great for a play date, not ideal for a party.
Again, just my opinion, but Funtastic Playland is too big and too stimulating. They have SO much to offer, and the owners really are fantastic, but there is too much in the space for kids this age. Again, that is just my opinion. I mean no offence.
We had reserved ump and Bounce, but then they went out of business so now we are having our daughter's party at Walker Ranch Park. They have a great playscape and they are free, as long as you don't want to reserve a shelter- if you do it is $40-$80. SA weather lets you have outdoor parties with little fear of weather problems.
Another fantastic polace for a party is the Feista Farm. They have pony rides included in the price of the reservation and the prices are really great.
Artworks sounds like fun, but we haven't been there yet. The children's museum also has parties. Good luck and have fun. The moms in my moms group really like Dynamoze, but I have not been there yet, so I can't say from first hand experiance.
Have fun and good luck.