Rula Bula is the place to go if you're...
1. Stuck on Mill (no offense Mill...my 21 year old former self loves you and I always know to visit you first if I want a crazy time!)
2. Looking for a bar with people drinking themselves to the point of having a good time
3. Want to participate in events like trivia night
Rula Bula is a good time. But you have to go into it expecting to walk into a bar atmosphere hiding behind a restaurant. The patio is fun and there's plenty of room to sit. The food is decent and true to Irish dining. But I really don't think people go for the food. Every time I've gone, food has been an after-thought.
Be prepared to stand and wait for a seat if you're visiting after a festival or game. Rula Bula is practically the first stop after the light rail and Tempe Town Lake so it's a hot commodity! So my advice is to stick to Rula Bula if you've had some cocktails and won't mind the pub feel!