I'm so sorry that the guild you visited was so unfriendly. I've only been in one guild but they always had people sign in.... if you were a guest there was a box to check and the beginning of the meeting was to introduce guests. I remember that I felt a little out of place the first time I attended but there were lots of projects that they were working on and I didn't have a clue what they all were talking about. I caught on after a couple of visits. It was a very friendly group and I still have contact with some of them even though I've moved hundreds of miles away.
Please go to the next meeting....... when you pay at the door to attend the meeting, tell the person that you are new and looking for a friendly group to get involved with. Ask her/him if there is a newcomers group or ask for the last month's minutes so you can familiarize yourself with the projects that they are working on.
It won't take long and you'll be joining in on a project and will get to know people that love to quilt just like you. Good luck.