ya it was a lonnng day of playing, exploring, and meeting new people.
she's doing the same thing right now
i took her to a park and sat on a park bench on a busy trail for about an hour...she met all sorts of people and puppies.
Pretty tiring! aw.
Make sure she is not exposed to dogs you don't know until she is fully vaccinated.
But, a proper exposure and supervised socialization are key ingredients to having a balanced, not timid and playful pup. It's important she gets used to different noises, smells, objects, kids, adults, etc....