You've arrived at that interminable stretch of the calendar where the mercury has stalled above the 100-degree mark. The only chink in your scheme for never being away from air conditioning or shade for more than 90 seconds at a time is how to do your grocery shopping. All hail Eddie Basha, whose Bashas' at 40th Street and Thunderbird now offers drive-through grocery service. Simply phone in your order (fax and Internet orders are also available) by 10 a.m. for same-day pickup, drive your icy-cool Suburban up to a reserved cabana, and open your window just long enough to utter your name into a microphone. A few moments later, a friendly attendant will load your groceries into the back of your car. All coupons and club card savings apply to this luxurious service, which carries a nominal $4.95 service charge. For those of you who refuse to leave your house at all, delivery service is also available.