O's is one of my favorite bars, if for no other reason than the atmosphere. It totes itself as being a Italian-Irish Pub. The first thing you will notice when you walk in the bar is the astronomical number of bras hanging from the ceiling and various other places around the bar. Traditionally, you leave your bra if it is your first time there (I never did, but hey, bras are expensive!). The bartenders are always friendly. They have a jukebox, so the type of music will vary from rock to country, depending on who is pumping money into it. There is darts and foosball in the back, and lots of booths to sit back and relax and do some people watching. O's also has about the best pizza in FW, by far. The crowd is always laid back (except for Tuesday nights, which is "frat boy night" and it gets a little annoying). St. Patrick's Day is really crowded (as in, there will be a line to get in), so be prepared! It's a fun, relaxing place to hang out though!