Bodies of water are frequent metaphors in poetry, due to their unfathomable depths, unknowable sprawl, and unattainable river otters. Set sail into the enigma with today's Groupon: for $30, you get one admission to a 3.5-hour yacht party cruise from City Lights Cruises, departing from Long Beach's Rainbow Harbor (a $59 value). The value of today's deal does not include the two-drink minimum ($16).

City Lights Cruises cast off aboard the climate-controlled 350-passenger Endeavor, which boasts unobstructed views of the harbor from its open-air sky lounge. During the yacht party cruise, guests can fuel festivities by sampling eats from the onboard appetizer buffet. The bar stocks an array of libations to help sippers meet the two-beverage minimum before they hit the dance floor to bust a move to the live DJ's hip-hop, disco, reggae, and salsa tunes or the beats of one's own fluttering sea legs. Trips leave on Fridays, Saturdays, Sundays, and select holidays throughout the year. Whether day or night, the voyage makes for a picturesque escape for city dwellers or a pleasant respite from the daily doldrums of landlocked living.