I'm just two years out of school so I don't know work-invite etiquette - I'm an attorney in a large firm so I don't have a per se boss, but there's a partner and senior associate I work closely with. They took me out to lunch when I passed the bar and we go to a few afterwork networking events together. Other than that, we're very friendly at work but don't really hang out socially. I'm on the fence about inviting them - also it's an out-of-town wedding, practically a destination wedding for people around here.
Are there any hard and fast rules I should know about?