Been here multiple times, three to be exact (tried to check in during my second visit but Yelp was down).
My first visit was awesome, the service was great and the food was solid. This visit I would've given 4 stars given the service, food and overall vibe of the place.
During my second visit, the service was absolutely awful. Our server was rude, hardly came to our table and it seemed like we were burdening him with our presence. It didn't help matters that our host put us at a table for 2 people when we had 3 people in our party, so our table was not adequately sized to have our entrees on it. This visit I chalked up as an anomaly.
My third visit, again with a party of 3, we sat on the patio. There were three servers on the patio and 2 parties totaling 5 people. Our server is candidate for one of the worst servers I've ever had. She was rude, again we felt like a burden to her and she spent more time flirting with her colleague than actually coming to our table. A meal that should've taken 35 minutes took 75 minutes. Getting our check was even painstaking.
Needless to say that based on 2 out of 3 of my visits to Frank & Lupe's I give up on it. The food is okay but not worth the price of admission and the lackluster service that seems to be commonplace.