This is my favorite bar in Madison. The staff are really friendly and serve up good drinks. It can get crowded on the weekend nights, but I can almost always find a seat with my friends. I especially like to sit outside on their patio, when it's warm enough. It does stink that the patio closes earlier than the inside (I think at one), but that is a Madison ordinance's fault not Genna's (or so I think I was told...). The juke box is pretty good, not a huge selection, but a pretty good one.
I work until 6, so I miss their happy hour, but I hear it's good, free food and good drink specials.
Go to Genna's, drink, and be merry.