After an experimental debut last August in front of Fika Espresso Bar and Bombay’s restaurant on Pearl Street, city-approved curbside pop-up cafés—affectionately known as “gutter cafés” for their parking-spot-size proportions—are multiplying this month, in midtown (O’Casey’s, 22 E. 41st St.; Le Pain Quotidien, 708 Third Ave.), Soho (Local, 144 Sullivan St.), and Cobble Hill (Ecopolis Café, 180 Smith St.). Each business designs and constructs its own planter-buffered platform, which holds two-tops for twenty at Le Pain and sea-grass-lined communal benches at Local (through mid-October).