That's it really...AIBU to think this is incredibley showy to send flowers or balloons etc to your partners workplace. It reeks of smug couples and "look at me and this big generic grand gesture I can do in front of as many people as possible ". Understated things done more privately are a lot better and I've never actually seen anyone not look embarrassed to have flowers delivered to them at work. It's done more as a "look what a wonderful DP I am in front of my partners work colleagues " thing....
Yes I'm in a relationship and not bitter. I get flowers and this idea would be my worse nightmare 