Valentine's Day is tomorrow. And, since you waited until the last minute, basically every quality restaurant in town is booked, so I can't help you there. But I can help make it seem like you tried with these last-minute Valentine's Day dates.
The Somewhat Traditional Date
Stop by Wit & Wisdom in the Four Seasons Hotel for a drink and some appetizers at the bar/lounge. The view and fancy drinks might help your date forget that they're not eating a full meal. Then, head down the street to the Landmark Theater for a fancier movie experience (wine and beer delivered to your seats--who could ask for anything better?). I recommend you stay away from seeing 50 Shades of Grey, no matter how much you might think it will "set the mood." Instead, see The Theory of Everything, a much more interesting and realistic portrayal of a relationship, with a bit of education on physics added in.
The Zen Date
Build your connection and muscle with a class at M.Power Yoga acroyoga class. According to M.Power, "Acroyoga is the yoga of trust, communication, and play. The dynamic aspects of the practice cultivate empowerment and strength. M.Power Flight School teaches you the basics of acroyoga including how to base, fly, and spot while working with a partner." The studio is also offering a Groupon deal right now, 10 classes for $16 when you use my link. After your workout, walk across the street for a drink at Of Love & Regret.
The Alcohol-centric Date
So, if you waited until the last-minute to plan a Valentine's Day date, you're going to have a really tough time getting a dinner or even lunch reservation--enter the alcohol-centric date. Since you're not getting a table, head to the bars of all those fancy restaurants and do a classy, sophisticated bar crawl. Consider starting at The 13th Floor in The Belvedere, heading downstairs to The Owl Bar, then across the street to The Brewer's Art (their Resurrection Ale is my personal favorite). Once you're nice and liquored up, I suggest walking down the street toward University of Baltimore to find an oasis of college drunk foods -- Chipotle, Pot Belly, Pizza shops, etc. This date is the perfect combination of class and regret.
The Girlfriends Date
For many, Valentine's Day ends up being a reminder that you are alone. But wallowing in your aloneness is far, far more pathetic than simply being single. So, instead of wallowing, spend the day with your friends. Start out with brunch at The Point in Fells Point, and be sure to add on the unlimited mimosas for $12. After drinks, treat yo'self by shopping (or window shopping) at the cute boutiques.
The "Run Around in Your Underwear" Date
Despite the freezing forecast tomorrow, hundreds of Baltimoreans are going to run around the city in their underwear for Cupid's Undie Run--why not be one of them? The race benefits the Children's Tumor Foundation, so instead of spending a ton of money on a fancy dinner for you and your significant other, donate that money to the foundation and have one of the funnest, coldest and most unusual Valentine's Day Dates ever.