Drop in style classes for baby

Hi Houston – I’m looking for some places that offer drop in style class for babies – gymnastics, music, etc. I have a very active 10 month old and as you all know it’s truly impossible to spend time outside right now. It’s also really hard to find things to do on the weekends with my son because a lot of baby classes are either 1) only offered on the week days or 2) require some sort of tuition to follow a weekly schedule which just isn’t really realistic for us because we tend to have busy weekends anyway but on the ones we don’t we’re itching to do something fun