I had such a great experience today with Pokémon Go:
I was walking trough the City with my catching buddy when we stopped at a fountain where two Girls activated a Lure Module to bring in some Pokémon. We had a nice chat and caught some Pokémon (finally got a Psyduck!) when we noticed that in the nearby park some activated two Lure Modules next to each other. My buddy and i decided to go check it out, so we went to the park. There were like 30 players there, all waiting to catch some Pokemon. It was such an amazing sight
I was chatting with some of the other players when it happend: someone yelled "Bulbasaur!!" from the playground, and all you saw was that big group of people simultainously standing up, and walking towards the playground in the hope to catch Bulbasaur. I couldn't because my GPS kept scrweing me up and decided that i was standing like 200 Meters away from my actual location (probably because of the huge amount of people). Just as most were completing their catches, the next person was yelling: "BLASTOISE!!" And the whole group just started sprinting back to our original spot, because that's where Blastoise appeared. I also got a chance to catch it (239 CP), but it got away.
During the next 10 Minutes 2 more Bulbasaurs appeared, but again, my GPS

Suddenly, someone yelled out loud: "Nidoking appeared nearby!" Everyone checked their phones, and indeed, the shape of Nidorans final form appeared. One of the people who were present was someone i knew from a few days ago. He lived nearby, so he started guiding everyone to the spot he thought Nidoking appeared. When we arrived there, it turned out to be a Nidoqueen, but everyone tried their best to catch it. Since my GPS kept screwing me up, one of the the first people who caught Nidoqueen offered me to log into the game with his phone, so i could get a chance to catch Nidoqueen, and i did. 839 CP, my third strongest Pokemon.
This whole thing was so amazing. Just to see such a big group of people coming together just because of the Lure Module, and then to go on a short hunting trip together was just pure Magic to me. I had so much fun that i want this to happen again tomorrow. I'm gonna be there, waiting with my Tablet this time around (i hope its GPS is better), and hope to see again such a huge group of of people just talking and catching Pokémon together.
It felt like in the reveal trailer when Mewtwo appeared. Everyone catching and cheering at each other. Just amazing