What is the term used to describe Larry and Mike's living situation?

The term "roommates" is used to describe individuals who share a living space, typically a room or an apartment, but do not necessarily have a romantic relationship. This term commonly refers to people who live together while maintaining separate lives, which fits the situation of Larry and Mike sharing living quarters.

While "housemates" is similar, it often refers to individuals living in a larger house with multiple residents, which may imply a different arrangement than what is indicated in the question. "Partners" generally suggests a romantic or business relationship, which would not be appropriate for describing a shared living condition without that context. The term "flatmates" is more commonly used in certain regions, particularly in British English to refer specifically to people sharing a flat or apartment, but it may not be as universally recognized in other English-speaking areas. Thus, "roommates" is the most appropriate and widely accepted term for their living situation.