Head to the Kendall Square Community Ice Skating Rink (300 Athenaeum St., Cambridge, 617-492-0941, www.kendallsquare.org for detailed directions from T) for some gliding, spinning, or merely trying to keep your balance. This is a good excuse for hand-holding, if you're at that stage. $18 includes skate rentals. Pictured: William Watson, of Columbia, S.C., and Andrana Parziale, of Somerville, take a turn on the ice.
Fuel up with a 12-inch cheese pizza from Emma's (40 Hampshire St., Cambridge, 617-864-8534, www.emmaspizza.com). $9. Add tip: $2.
Head into Inman Square for some free music at Atwood's Tavern (877 Cambridge St., Cambridge, 617-864-2792, www.atwoodstavern.com). You'll have just enough left in your budget to share a beer on tap ($4.50-$7). Add tip: $1.