You might post this in bathrooms, or building a house section. Most larger cities will have a few showrooms that have many models to look at -- any Ferguson showroom will have a lot to see (though I might not buy it there!). Most places will let you sit in the tubs, but it's hard to know what they will feel like filled with water. Some showrooms actually have the ability to add water to a few models -- but I think this is rare and only useful if it's the model you want (and you bring a swimsuit?).