One of my favorite teacher's mother recently died and will be hosting a Shiva at his house tomorrow. A few of my friends and I are going to go, and there was some talk over what is appropriate dress. I was thinking that a polo shirt and khakis/suit pants would do? A suit isn't standard, as is typical at a funeral, right? Also, one of my friends attended a Shiva earlier this year and described the atmosphere as being surprisingly jovial. Is this true of most shivas? I would greatly appreciate any answers or additional comments!