At Boca Fiesta, you can make your own Guacamole. They give you all the ingredients and tools. It's fun to experiment by adding little things at once and tasting the different flavors along the way. This was my favorite guacamole, taste-wise, undoubtedly.
It's not perfect though. It's pretty pricy ($6) but that does come with a whole basket of chips. The rest of the food at Boca Fiesta is really good too, and I recommend saving some of your Guacamole to dip in whatever you order!