When I was out walking today I walked past a day care centre that had a sign on the fence and another big sign inside the fence saying that a playgroup is held Wednesday 10-12, for kids 0-5 and "everyone welcome" but no phone number or anything. There are a couple of other playgroup type things they have there too and they were on signs next to the other playgroup signs, but both of them had contact numbers which were different to each other.

I'm not sure what to do, I would really like to try this one and see if it's better than the one I currently go to (I took a break from it for about a month, went back last week and two days later I start getting a cold..go figure ). Can I just rock up when it says? Not that I feel very comfortable doing that as I have no idea who goes to it and would be by myself, I'm not that great at making introductions!
I did a google search and came up with two possibilities that may be it, but both have different phone numbers. One of them only says the street it's on, while the other has a numbered address (same street) so I'd say they are one and the same, but the numbers are different so who knows if either still works.

What would you do? Rock up to a strange playgroup and say hi...or should I try the numbers and see what happens? It's also a child care centre so that makes it a bit more difficult as they must have more than one thing going on in the building at one time.