The culture at Mattress Firm is incredibly positive. If you are familiar with the song "Happy" by Pharell, that song reminds me of work as strange as that sounds.
The dress is business professional. (Shirt and tie, jacket not necessary.) We do have quite a few get-togethers in my market. We celebrate each promotion as well as occasional parties just to get to know our co-workers.(Many involve free pizza) In Indianapolis, we even go to Buffalo Wild Wings together to watch UFC Fights fairly regularly.
The typical day at Mattress Firm involves taking care of guests, general cleaning and organizing in the store and tracking your sales. We are also very big on shouting out each other and our accomplishments.